[1] University of Southern California,Department of Medicine, Keck School of Medicine
[2] Los Angeles County + University of Southern California (LAC+USC) Medical Center,Division of Rheumatology, Department of Medicine
[3] The Johns Hopkins University School of Medicine,Division of Rheumatology, Department of Medicine, Grossman School of Medicine
[4] Johns Hopkins University,Division of Rheumatology, Department of Medicine, Keck School of Medicine
[5] New York University,undefined
[6] University of Southern California,undefined