[1
]University of Pennsylvania School of Medicine Philadelphia
[2
]Boston University School of Medicine Boston Massachusetts
[3
]University of Maryland School of Medicine and Veterans Affairs Maryland Health Care
System Baltimore
[4
]Arcadia University Glenside Pennsylvania
[5
]McMaster University Hamilton Ontario Canada
[6
]Rush University Medical Center Chicago Illinois
[7
]University of North Carolina School of Medicine Chapel Hill
[8
]South Holland Recreational Services, University of Chicago, and Ingalls Memorial Hospital
Thornton Illinois
[9
]University of Michigan Medical Center Ann Arbor
[11
]Tufts Medical Center Boston Massachusetts
[12
]University of Toronto Toronto Ontario Canada
[14
]University of Arizona College of Medicine Tucson
[15
]New York University Langone Medical Center New York New York
[16
]University of Delaware Newark
[17
]University of California Davis
[18
]Ronald Reagan UCLA Medical Center Los Angeles California
[19
]Johns Hopkins University School of Medicine Baltimore Maryland
[20
]ECRI Institute Plymouth Meeting Pennsylvania
[21
]Cedars Sinai Medical Center Los Angeles California
[22
]American College of Rheumatology Atlanta Georgia
[23
]University of Minnesota Minneapolis