PRISCILLA ROBINSON VS. UNITED AIRLINES (DIVISION OF WORKERS' COMPENSATION) ( 2019 )


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  •                                 NOT FOR PUBLICATION WITHOUT THE
    APPROVAL OF THE APPELLATE DIVISION
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    SUPERIOR COURT OF NEW JERSEY
    APPELLATE DIVISION
    DOCKET NO. A-5917-17T2
    PRISCILLA ROBINSON,
    Petitioner-Appellant,
    v.
    UNITED AIRLINES,
    Respondent-Respondent.
    ___________________________
    Submitted May 1, 2019 – Decided September 18, 2019
    Before Judges Nugent and Mawla.
    On appeal from the Department of Labor and
    Workforce Development, Division of Workers'
    Compensation, Claim Petition No. 2017-5603.
    Kotlar, Hernandez & Cohen, LLC, attorneys for
    appellant (Matthew J. Solin and Erika M. Page, on the
    briefs).
    Capehart & Scatchard, PA, attorneys for respondent
    (Prudence M. Higbee, on the brief).
    The opinion of the court was delivered by
    NUGENT, J.A.D.
    In this workers' compensation action, petitioner, Priscilla Robinson,
    appeals from an order that denied her motion for medical and temporary
    disability benefits. Petitioner claimed that while undergoing authorized therapy
    for a fractured wrist that arose out of and in the course of her employment, she
    either tore the rotator cuff in her left arm or aggravated an existing tear, and now
    requires surgery. Respondent, United Airlines, disputed the injury arose out of
    her employment. Respondent contended petitioner's injury existed before she
    started her therapy and was neither caused nor aggravated by the therapy. The
    judge of compensation (JOC) determined petitioner had not carried her burden
    of proving her claim was compensable and denied the claim. For the reasons
    that follow, we affirm.
    I.
    A.
    Petitioner filed a claim petition in which she alleged she sustained an
    injury to her left shoulder on June 15, 2016, while undergoing authorized
    therapy for a previous work injury. The following month, respondent filed an
    answer to the claim petition and admitted petitioner's shoulder injury arose out
    of and in the course of her employment. After receiving additional information
    concerning petitioner's injury, respondent filed an amended answer to the claim
    A-5917-17T2
    2
    petition and denied that petitioner's injury arose out of and in the course of her
    employment.
    In view of respondent's amended claim petition and denial that petitioner's
    injury was compensable, petitioner filed a Notice of Motion for Temporary and
    Medical Benefits.    The hearing on petitioner's motion took place on four
    nonconsecutive days from December 2017 through May 2018.               Following
    written submissions, the JOC denied petitioner's motion. This appeal followed.
    B.
    The parties presented the following evidence during the hearing on
    petitioner's motion for temporary and medical benefits. Petitioner had been
    employed by respondent for thirty-two years as a flight attendant when she
    sustained an injury to her right wrist during the course of her employment in
    March 2016. Respondent authorized three phases of treatment for petitioner's
    wrist injury: casting and medical treatment necessary for the injury to heal;
    occupational therapy; and physical therapy to condition her to return to work.
    Petitioner completed the first two phases without incident. She began the third
    phase, work conditioning, on June 15, 2016. She contended she sustained or
    aggravated her left shoulder injury that day.
    A-5917-17T2
    3
    Petitioner and the therapist who oversaw the therapy gave conflicting
    testimony about what happened. According to petitioner, on June 15, 2016, her
    first day of work-conditioning therapy, the therapist made her do several
    exercises in sets of ten. For the first exercise, the therapist put weights in
    buckets and petitioner had to walk from one end of the room to the other carrying
    both buckets. When she finished that set of ten, she worked on what she
    described as a lift-up machine, in which she would lift a bar to approximately
    eye level. Last, she did ten sets of exercise requiring her to push against a wall,
    followed by an exercise where she lifted her arms and brought them back.
    Plaintiff did not feel well at the completion of these exercises, though she
    could not pinpoint the precise problem.       She had shortness of breath and
    palpitations. The upper part of her body "didn't feel right." Nonetheless, she
    began to ride a stationary bike but could not complete the scheduled fifteen
    minutes. She stopped after nine or ten minutes.
    Petitioner left therapy without complaining about any shoulder pain.
    Once home, however, she experienced pain in her left shoulder which became
    worse during the course of the afternoon. The next day, she saw her primary
    physician, who wrote a letter to the therapist. According to petitioner, her
    A-5917-17T2
    4
    physician advised the therapist "to hold off on the work conditioning until we
    got the results back from the X-ray and the MRI."
    The physical therapist testified for respondent and contradicted
    petitioner's testimony.    The therapist was a sixteen-year employee of the
    outpatient rehabilitation facility that petitioner attended. She testified that when
    petitioner appeared on June 15, 2016, for her first work conditioning session,
    she started the session with pre-conditioning exercises. The pre-conditioning
    exercises were all stretching exercises. Seven involved the lower extremities,
    waist, and lower back. The eighth was a combination shoulder-chest exercise
    where one stretched the chest muscles by pinching the shoulder blades together
    and then relaxing. Petitioner had no complaints concerning her shoulder during
    the stretching exercises. Had she so complained, the therapist would have made
    an entry in her notes. Petitioner also did some cardio training—seven minutes
    on an upright, recumbent bike.
    Petitioner reported feeling heart palpitations and weight on her chest. The
    therapist offered to take petitioner's vital signs, that is, petitioner's blood
    pressure and heart rate, or call 9-1-1.      Petitioner declined.    The therapist
    reviewed some home exercises with petitioner, and petitioner said she would see
    A-5917-17T2
    5
    her doctor the next day. The therapist told petitioner to obtain clearance to
    resume work conditioning.
    Petitioner returned two days later, on June 17, 2016, with a physician's
    note. The physician's note said petitioner had reported severe left shoulder pain.
    Pending an MRI, she was to do therapy for her right wrist only. Petitioner was
    also scheduled to see a cardiologist. In view of the note, the therapist modified
    the Baltimore Therapeutic Equipment machine—a machine that simulated
    workplace activities—to restrict exercises to petitioner's right hand and right
    uppers only. The therapist noted petitioner had no complaints of pain that day.
    Petitioner next returned on June 20, 2016. She had no complaints of pain
    and no complaints of cardiac issues. That day, petitioner did one exercise where
    she used both arms: the push-pull cart, which simulated pushing a beverage cart.
    Typically, a clinic patient pushes the cart for approximately 200 feet. That was
    the only exercise petitioner did with both hands; she did the other exercises with
    her right hand.
    Petitioner's medical expert, Craig H. Rosen, an orthopedic surgeon,
    examined petitioner on January 11, 2018. He reviewed her medical records,
    including a June 22, 2016 MRI, which revealed a torn rotator cuff in petitioner's
    left shoulder. Dr. Rosen diagnosed petitioner with a left rotator cuff tear and
    A-5917-17T2
    6
    recommended that she undergo arthroscopic surgery to repair the torn rotator
    cuff. Post-surgical care would include physical therapy for two or three months.
    Concerning causation, Dr. Rosen expressed the following opinion:
    Either the injury occurred at the time of her physical
    therapy session on June 15, 2016, with the maneuvers
    that she was doing, and she described lifting some kind
    of bar and getting in some kind of swimming motion,
    and, therefore, that would make the tear directly related
    to that episode or that incident. The other alternative is
    that she could have had a pre-existent tear on her
    shoulder that was quiescent, asymptomatic, and that
    this was a precipitating event that made her
    symptomatic and aggravated the underlying problem
    that she did not know about.
    Dr. Rosen explained that because the muscles going into the rotator cuff
    were not atrophied and had no fatty infiltration, "this is not a longstanding
    chronic tear." If the tear was longstanding, the MRI would show some evidence
    of muscle atrophy or fatty infiltration. Generally, it takes two or three years for
    fatty infiltrates to develop.
    Dr. Rosen repeated that from the MRI, he could not say whether this was
    an old tear or a new tear. The MRI showed the tendon was torn off at the surface,
    but the doctor did not "know the age of that." He further explained: "it 's a large
    enough tear, it will move immediately a bit, but it is not a chronic retracted tear
    to the left of the glenoid or the dish in the shoulder that would indicate that this
    A-5917-17T2
    7
    is being [sic] there for any long period of time." With a large tear, over time,
    there would be some "retraction of the tendon and atrophy of the muscles, but
    that takes time to develop."
    Dr. Rosen reiterated that petitioner told him she was lifting some type of
    bar and going through a swimming type of motion during her work conditioning.
    He elaborated:
    If I'm understanding her correctly, and I'm just going
    on her telling me what the - - if she was lifting
    something heavy, a bar that went up at least to shoulder
    level and higher, and doing some type of motion with
    her arm out in that position, it is possible to tear a
    rotator cuff. If you take a [two] or [three]-pound
    weight, and put it in your hand, when you hold it out
    straight, you now multiply that, if you go through the
    physics and biomechanics of it, you've now multiplied
    that weight many, many times, by the lever of your arm,
    so a [two] or [three] pound weight may be [fifteen] or
    [twenty] pounds or more. I didn't do the analysis right
    off the top of my head here, but a small weight can
    place much, much greater stress on the shoulder, if the
    arm is out extended.
    During cross-examination, Dr. Rosen said petitioner told him "she was
    holding onto a bar, and she had to lift her arm up in a swimming-type motion."
    She said nothing more specific concerning the movement of her arms, other than
    that "it was a swimming-type motion." In the history he recorded, Dr. Rosen
    ascribed the following statement to petitioner: "[w]ell, my initial note said . . .
    A-5917-17T2
    8
    'she says, at that point, according to myself, she was lifting a bar, doing a swim-
    type exercise, and noted the onset of pain in her left shoulder.'" Dr. Rosen added
    that if she was lifting the bar from shoulder to eye level, the exercise could cause
    a rotator cuff tear provided there was enough weight and stress. He could not
    quantify the amount of weight necessary,
    Respondent's evaluating physician, Kenneth A. Levitsky, also an
    orthopedic surgeon, disagreed that petitioner's left rotator cuff tear was caused
    or exacerbated by her work conditioning therapy. Dr. Levitsky explained that
    the most likely mechanism of injury for a rotator cuff tear would be an extension
    or abduction stretch-type injury with the arm overhead. Other causes could be
    "a very, very forceful twisting injury perhaps, but to a lesser likelihood, perhaps
    with the arm below the shoulder blade." The doctor opined that leaning against
    a wall was an unlikely cause of a rotator cuff tear. He found leaning against a
    wall to be an unlikely cause because "to tear a rotator cuff acutely it requires a
    significant amount of force and it requires the right mechanism, and simply
    leaning against the wall in my opinion, . . . isn't a plausible or a mechanism that
    would cause a rotator cuff tear."
    Shown a list of the preconditioning exercises petitioner performed on June
    15, 2016, Dr. Levitsky opined that none of the exercises would cause a rotator
    A-5917-17T2
    9
    cuff tear.   None, he said, were forceful enough and none fit the classic
    mechanism of injury. He added, "[t]here's no exercise here that demonstrates or
    would cause a significant twisting force on the shoulder with the arm in an
    unusual position."
    Dr. Levitsky examined petitioner on July 24, 2016. He also took a history
    and reviewed her medical records, including the June 2016 MRI study. Based
    on the history petitioner gave him, his review of medical records including the
    diagnostic studies, and his clinical examination of petitioner, Dr. Levitsky
    concluded the rotator cuff tear "was likely in my opinion to be a pre-existing
    tear and was not causally related from the occurrence that was a self-described
    stretching and pushing exercise against the wall." The doctor reiterated that the
    exercise plaintiff did on her first day of work conditioning was not a sufficient
    mechanism of injury to cause a rotator cuff tear.
    Dr. Levitsky also read the testimony given by petitioner, the therapist, and
    Dr. Rosen.    Citing the therapist's testimony that petitioner only performed
    stretching exercises on her first day of work conditioning, and never complained
    of pain, Dr. Levitsky said the therapist's testimony confirmed his opinion.
    Nothing in the occupational therapist's testimony indicated a mechanism of
    injury that would cause a rotator cuff tear.
    A-5917-17T2
    10
    Petitioner's testimony did not alter his opinion. He thought Dr. Rosen's
    testimony demonstrated some confusion about which exercises petitioner
    performed on each of the three dates she participated in work conditioning
    therapy. For example, Dr. Rosen thought petitioner had lifted a bar on June 15,
    2016. This was not the case, as testified to by the therapist and documented in
    her notes.
    Dr. Levitsky further opined that in order to materially aggravate or
    exacerbate a pre-existent rotator cuff tear, one would still need an adequate
    mechanism of injury, which was not the case here. Further, to reach such a
    conclusion, one would have to seek comparative MRI studies, before and after
    the purported injury, to determine if a tear existed and was made materially
    worse.
    Like Dr. Rosen, Dr. Levitsky could not say from his review of the MRI
    when the tear occurred. He pointed out, however, that the MRI of petitioner's
    shoulder also showed some degenerative changes, which were clearly pre-
    existing to her physical therapy.
    During cross-examination, Dr. Levitsky agreed that merely having a
    rotator cuff tear is not enough to require surgery. Surgery would be required if
    a tear was accompanied by pain and interference with activities of daily living
    A-5917-17T2
    11
    and the condition was not getting better with time. Dr. Levitsky also agreed
    with Dr. Rosen that petitioner needs surgery to repair her torn rotator cuff, and
    he did not have any reason to believe she was a shoulder-surgery candidate
    before June 15, 2016, when she began her work conditioning therapy.
    According to Dr. Levitsky's report, petitioner's rotator cuff tear was likely
    asymptomatic before reporting shoulder pain to her treating physician the day
    after she began work conditioning therapy. Dr. Levitsky recommended three
    weeks of physical therapy and a cortisone injection as treatment for the torn
    rotator cuff.
    C.
    In a written opinion, the JOC found petitioner had not proven her rotator
    cuff tear was caused or exacerbated by her work conditioning therapy. The JOC
    noted that at no time during petitioner's three work conditioning sessions did she
    complain of having suffered an injury to her left shoulder during therapy. This
    was corroborated by the daily activity logs completed by the therapist after each
    session. Moreover, when petitioner first saw her doctor about discomfort in her
    left shoulder, she did not state that she had suffered a traumatic accident which
    resulted in the injury. And though petitioner told Dr. Rosen she had injured her
    shoulder while lifting a bar and doing a swimming-type motion, petitioner's
    A-5917-17T2
    12
    therapist testified petitioner did not lift a bar during the initial work conditioning
    session on June 15, 2016.
    The JOC found Dr. Levitsky's opinion credible, logical, and both
    medically and factually well supported. In contrast, the JOC found Dr. Rosen's
    testimony as to the cause of petitioner's rotator cuff tear to be speculative and
    without certainty.     Consequently, the JOC determined petitioner had not
    sustained her burden of proving she had sustained a compensable accident.
    II.
    On appeal, petitioner argues the JOC misapplied the burden of proof and
    misunderstood the standard for expert testimony. Petitioner asserts that when
    "it is claimed the accident was the result of the physical condition of the
    employee, the burden of proof is on the employer to show such cause."
    According to petitioner, respondent failed to demonstrate petitioner's injury was
    "idiopathic."
    Petitioner points out that during cross-examination, Dr. Levitsky said he
    had no reason to doubt that her symptoms started on or about June 15, 2016.
    Moreover, Dr. Levitsky agreed petitioner required surgery to repair the rotator
    cuff tear and petitioner was not a surgical candidate before her first work
    A-5917-17T2
    13
    conditioning session on June 15, 2016. In his report, Dr. Levitsky recommended
    some treatment for petitioner's shoulder. Specifically, Dr. Levitsky wrote:
    If the examinee's history as presented to me is factually
    correct . . . I would recommend physical therapy for
    [three] weeks and a cortisone injection into the
    subacromial space for treatment as it relates to the
    reported physiotherapy incident. I would not indicate
    surgical treatment for repair of the rotator cuff tear as it
    relates to the reported June 16, 2016 injury as it is my
    opinion that this rotator cuff abnormality was pre-
    existing. Further treatment for the rotator cuff tear in
    my opinion would be appropriately pursued outside of
    her Worker's Compensation claim.
    Petitioner construes this part of Dr. Levitsky's opinion as a concession that her
    shoulder injury was exacerbated by her physical therapy.
    Petitioner also argues the JOC erred by rejecting the testimony of Dr.
    Rosen. Last, petitioner argues that the JOC's decision is not supported by
    credible evidence on the record.
    Respondent counters that the JOC's decision is supported in its entirety by
    competent evidence, including lay and expert testimony. Respondent asserts the
    JOC properly found the testimony of both petitioner and her medical expert
    lacking in credibility. Consequently, the JOC properly concluded petitioner had
    not sustained her burden of proving each element of her claim.
    A-5917-17T2
    14
    III.
    A.
    The Workers' Compensation Act (Act), N.J.S.A. 34:15-1 to -146, is
    "remedial social legislation that should be liberally construed in order that its
    beneficent purposes may be accomplished." Shaudys v. IMO Indus., Inc., 
    285 N.J. Super. 407
    , 410 (App. Div. 1995) (citing Fiore v. Consol. Freightways, 
    140 N.J. 452
    , 465 (1995)). It is an "axiomatic principle that the language of the [Act]
    must be liberally construed in favor of the claimant[.]" Close v. Kordulak Bros.,
    
    44 N.J. 589
    , 604 (1965).
    The burden of proving that an accident is compensable "rests upon a
    workers' compensation claimant." Drake v. Essex Cty., 
    192 N.J. Super. 177
    ,
    179-80 (1983) (citing Mahoney v. Nitroform Co., 
    36 N.J. Super. 116
    , 125 (App.
    Div. 1955), rev'd on other grounds, 
    20 N.J. 449
    (1956)). Under the Act, an
    injury is compensable if it "is caused to an employee by [an] accident arising
    out of and in the course of his employment[.]" N.J.S.A. 34:15-1. The phrase
    "arising out of" refers to the accident's "causal origin," and the phrase "course
    of employment" refers to the "time, place, and circumstances of the accident in
    relation to the employment." Cannuscio v. Claridge Hotel & Casino, 319 N.J.
    Super. 342, 349 (App. Div. 1999) (quoting 
    Shaudys, 285 N.J. Super. at 410
    ).
    A-5917-17T2
    15
    The arising out of requirement "looks to a causal connection between the
    employment and the injury. It must be established that the work was at least a
    contributing cause of the injury and that the risk of the occurrence was
    reasonably incident to the employment." Coleman v. Cycle Transformer Corp.,
    
    105 N.J. 285
    , 290 (1986).
    New Jersey uses "the 'but for' or positional-risk test" in "determining the
    requisite connection[.]" 
    Ibid. "Essentially, that test
    asks 'whether it is more
    probably true than not that the injury would have occurred during the time and
    place of employment rather than elsewhere.'" 
    Id. at 290-91
    (quoting Howard v.
    Harwood's Rest. Co., 
    25 N.J. 72
    , 83 (1957)). "Unless it is more probable that
    the injury would not have occurred under the normal circumstances of everyday
    life outside of the employment, the necessary causal connection has not been
    established." 
    Id. at 291.
    One of the components of the "but for" test is the
    nature of the risk that causes injury to the employee.
    Our courts have established three categories of risks.
    The first category includes risks "distinctly associated"
    with the employment, which are compensable.
    Examples of such injuries are industrial injuries
    resulting from machinery. The second category
    includes compensable "neutral" risks which do not
    originate in the employment environment but rather
    happen to befall the employee during the course of
    employment. The typical examples of neutral risks are
    acts of God, such as lightning. The third category of
    A-5917-17T2
    16
    risks includes those "personal" to the employee and are
    not compensable. In this category, the employment
    connection with the injury is minimal; it is the personal
    proclivities or contacts of the employee, not anything
    associated with the employment that gives rise to the
    injury. An epileptic seizure would be a classic
    example.
    
    [Shaudys, 285 N.J. Super. at 411
    (citations omitted).]
    The third category of risks—personal proclivities or contacts of the
    employee that give rise to the injury—are often referred to as "idiopathic."
    George v. Great E. Food Prods., Inc., 
    44 N.J. 44
    , 45 (1965).
    Risks that are personal to the claimant are defined as follows:
    If the time has come for the employee to
    die a natural death, or to expire from the
    effects of some disease or internal
    weakness of which he would as promptly
    have expired whether he had been working
    or not, the fact that his demise takes place
    in an employment setting rather than at
    home does not, of course, make the death
    compensable. Or if the employee has a
    mortal personal enemy who has sworn to
    seek him out wherever he may be, and if
    this enemy happens to find and murder the
    employee while the latter is at work, the
    employment cannot be said to have had any
    causal relation to his death. [1 Arthur]
    Larson, [Workmen's Compensation] § 7.20
    (1990).]
    [Verge v. Cty. of Morris, 
    272 N.J. Super. 118
    ,
    127 (App. Div. 1994).]
    A-5917-17T2
    17
    Another example of idiopathic injuries "are falls brought on by heart
    attacks[.]" 
    Id. at 124.
    "The burden of proof to establish an idiopathic cause is
    placed on the employer." 
    Id. at 128
    (citing Spindler v. Universal Chain Corp.,
    
    11 N.J. 34
    , 38 (1952)). "To bar recovery, the record must substantiate a finding
    that the event was caused solely by disease or infirmity peculiar to the individual
    and not a condition of the employment." 
    Id. at 124
    (citing 
    Spindler, 11 N.J. at 39
    ).
    Our review of the JOC's denial of petitioner's motion for temporary and
    medical benefits is limited "to whether the findings made could reasonably have
    been reached on sufficient credible evidence present in the record, considering
    the proofs as a whole, with due regard to the opportunity of the one who heard
    the witnesses to judge[ ] their credibility." Lindquist v. City of Jersey City Fire
    Dep't, 
    175 N.J. 244
    , 262 (2003) (quoting 
    Close, 44 N.J. at 599
    ). "We owe no
    particular deference to the [JOC's] interpretation of the law." Sexton v. Cty. of
    Cumberland, 404 N.J. Super 542, 548 (App. Div. 2009) (citing Manalapan
    Realty, L.P. v. Twp. Comm. of Manalapan, 
    140 N.J. 366
    , 378 (1995)). If a JOC
    mistakenly applies the law to the facts, an appellate court "must grant
    appropriate relief." 
    Ibid. (quoting Verge, 272
    N.J. Super. at 123).
    A-5917-17T2
    18
    B.
    With these principles in mind, we first address petitioner's arguments that
    the JOC misapplied the burden of proof and misunderstood the legal standard
    for expert testimony. Petitioner contends the JOC should have considered the
    proofs under principles applicable to idiopathic injuries, which shift the burden
    of proof to respondent. We disagree. In our view, petitioner confuses those
    cases in which an employee's idiopathic condition causes a work accident or
    event that results in injury, with a work accident or event that aggravates a pre-
    existing condition or injury. Our cases make the distinction clear.
    The Supreme Court's Spindler decision is illustrative.          There, the
    employee, while operating a spooling machine, turned to replace a wrench on
    the tool shelf behind her when she slipped and fell on the concrete 
    floor. 11 N.J. at 36
    . She was uncertain about what had caused her to fall, speculating a piece
    of wire may have been the cause. 
    Id. at 37.
    Her employer argued "her injury
    probably resulted from dizziness or a fainting spell caused by a physical ailment
    rather than from any accident arising out of and in the course of her
    employment." 
    Id. at 38.
    As the court noted, however, there was "no affirmative
    evidence in the record to support this supposition other than the answer to a
    hypothetical question asked of a physician produced by the employer." 
    Ibid. A-5917-17T2 19 The
    court explained that "[w]here it is claimed the accident was the result of the
    physical condition of the employee, 'the burden of proof is on the employer to
    show such cause.'" 
    Ibid. (emphasis added) (quoting
    Atchison v. Colgate & Co.,
    
    3 N.J. Misc. 451
    (Sup. Ct.), aff'd, 
    102 N.J.L. 425
    (E. & A. 1925)). The Court
    further explained:
    Here the fall resulting in the injury is not
    disputed. The difference of opinion centers in the
    cause.
    If it was occasioned by or was the result of a
    disease or physical seizure and was not contributed to
    by "what the workman had to do," it is not
    compensable. On the other hand, if the fall "would not
    have occurred but for the service rendered" in the
    employment, it is covered by the statute.
    [Id. at 39.]
    The court concluded the accident was compensable. 
    Id. at 39-40.
    Similarly, in Verge, the dispute between the employer and employee was
    whether the permanent orthopedic injury petitioner suffered when she fell in the
    course of her employment was caused when her left foot slipped on a rug, or
    whether, as the employer claimed, her fall was an event not incident to
    employment but rather one that could have occurred anywhere at any time as
    one was walking 
    normally. 272 N.J. Super. at 121-23
    . Reversing the dismissal
    A-5917-17T2
    20
    of petitioner's claim petition due to an inadequate record, we remanded the
    matter for further proceedings. 
    Id. at 128
    -29. We explained:
    Petitioner need not show that the rug was defective or
    that she was free from fault. Respondent, however,
    cannot be denied the opportunity to prove by direct or
    circumstantial evidence that petitioner did not actually
    slip, but rather that her knee condition caused the event
    and therefore, her injury was caused solely because of
    her pre-existing or personal infirmity or condition.
    This is an issue which the judge could not resolve on
    the limited proofs permitted.
    ....
    The burden of proof to establish an idiopathic
    cause is placed on the employer.
    [
    Id. at 128
    .]
    In the case before us, the parties' dispute does not focus on whether an
    accident or event that occurred in the course of petitioner's employment was
    caused, on one hand, by an idiopathic condition or disease of petitioner, or, on
    the other hand, by what the worker had to do. Rather, the dispute focused on
    whether petitioner's shoulder injury was occasioned or aggravated by her
    therapy, or whether it represented the progression of a pre-existing injury.
    Stated differently, the dispute was whether any event had occurred at work and
    caused or aggravated petitioner's injury. Consequently, the burden of proof did
    A-5917-17T2
    21
    not shift to the employer and the JOC did not err by finding petitioner did not
    sustain her burden.
    That leads us to petitioner's next argument: the court applied the wrong
    standard for evaluating expert testimony. We disagree. There was a factual
    dispute concerning the facts upon which petitioner's medical expert based his
    opinion.    Petitioner's therapist refuted by her testimony and by her
    contemporaneous records that petitioner was doing the exercises to which her
    medical expert attributed the onset or aggravation of her shoulder injury. This
    foundation for her expert's testimony, as well as the difference in the opinions
    of the two medical experts, presented issues of credibility. The JOC's credibility
    determinations, as well as his findings of fact, "could reasonably have been
    reached on sufficient credible evidence present in the record, considering the
    proofs as a whole, with due regard to the opportunity of the one who heard the
    witnesses to judge . . . their credibility." 
    Lindquist, 175 N.J. at 262
    (quoting
    
    Close, 44 N.J. at 599
    ).
    IV.
    Petitioner last argues that the JOC's findings of fact are not grounded in
    credible evidence, and his decision fails to sufficiently articulate the basis for
    the factual and medical findings underlying his opinion. These arguments are
    A-5917-17T2
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    belied by the record. The judgment was based on findings of fact which were
    adequately supported by the evidence.     R. 2:11-3(e)(1)(A).   Petitioner's
    arguments to the contrary are without sufficient merit to warrant further
    discussion. R. 2:11-3(e)(1)(E).
    Affirmed.
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    23