1AUB GRADE Center, Clinical Research Institute, American University of Beirut, PO Box 11-0236, Riad El Solh, Beirut, 1107 2020 Lebanon
2Weill Cornell Medicine-Qatar- Department of Internal Medicine, Doha, Qatar
3Department of Rheumatology, Medical Institute, Al Ain Hospital, Al Ain, United Arab Emirates
4Dr. Humeira Badsha Medical Center, Rheumatologist City Hospital, Rheumatologist Neurospinal Hospital, Dubai, United Arab Emirates
5Ministry of Health, Muscat Governorate, Oman
6Department of Rheumatology, Cairo University, Giza, Egypt
7Rheumatology Division, Department of Internal Medicine, King Faisal Specialist Hospital and Research Center, Jeddah, Saudi Arabia
8Hamad Medical Corporation, Doha, Qatar
9Aspetar, Doha, Qatar
10Jordan Hospital, Amman, Jordan
11Division of Rheumatology, Department of Medicine, King Saud University, Riyadh, Saudi Arabia
12American University of Beirut, Beirut, Lebanon
13Faculty of Medicine, Univeristé Saint Joseph, Beirut, Lebanon
14Medicine Service and Center for Surgical Medical Acute care Research and Transitions, VA Medical Center, 510, 20th Street South, Birmingham, AL FOT 805B USA
15Department of Medicine at School of Medicine, and Division of Epidemiology at School of Public Health, University of Alabama, 1720 Second Ave. South, Birmingham, AL 35294-0022 USA
16Musculoskeletal Statistics Unit, The Parker Institute, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
17Department of Medicine, University of Ottawa, Ottawa, Canada
18Department of Medicine, McMaster University, Hamilton, ON Canada
19Department of Health Research Methods, Evidence, and Impact (HE&I), McMaster University, Hamilton, ON Canada
20Department of Internal Medicine, American University of Beirut, PO Box 11-0236, Riad El Solh, Beirut, 1107 2020 Lebanon