[1] McGill University Health Centre,Division of Clinical Epidemiology
[2] Northwestern University Feinberg School of Medicine,Division of Rheumatology
[3] Johns Hopkins University School of Medicine,Division of Rheumatology
[4] West Penn Allegheny Health System,The Hospital for Rheumatic Diseases
[5] Toronto Western Hospital,Cedars
[6] Université de Laval,Sinai Medical Center/David Geffen School of Medicine
[7] State University of New York - Downstate Medical Center,Rigshospitalet and Gentofte Hospital
[8] University of California San Francisco,undefined
[9] Hanyang University,undefined
[10] University of California Los Angeles,undefined
[11] Rigshospitalet,undefined
[12] Copenhagen University Hospital,undefined
[13] University of North Carolina at Chapel Hill,undefined
[14] University of Manitoba,undefined
[15] The University of Alabama,undefined
[16] Lund University Hospital,undefined
[17] Copenhagen University Hospital,undefined