5 Rheumatology Department, Djillali Bounaama University Hospital, Douera, Algiers, Algeria.
6 Faculty of Medicine El Mahdi Si Ahmed, Blida, Algeria.
7 Unit of Rheumatology, Internal Medicine Department, Al-Jahra Hospital, Ministry of Health, State of Kuwait, Kuwait City, Kuwait.
8 Division of Rheumatology, Department of Pediatrics, King Faisal Specialist Hospital and Research Center, College of Medicine, Al Faisal University, Riyadh, Saudi Arabia.
9 Rheumatology Unit, Department of Medicine, College of Medicine, University of Baghdad, Baghdad, Iraq.
10 Department of Internal Medicine, Rheumatology Division, Jordan Hospital & Medical Center, Amman, Jordan.
11 Division of Rheumatology, Department of Internal Medicine, Specialized Medical Center, Riyadh, Saudi Arabia.
12 Rheumatology Division of Internal Medicine, King Hussein Medical Center, Royal Medical Services, Jordan Armed Forces, Amman, Jordan.
13 Unit of Rheumatology, Department of Internal Medicine, Jaber Alahmed Hospital, Ministry of Health, State of Kuwait, Kuwait City, Kuwait.
14 Faculty of Medicine, Health Sciences Research Center (CReSS), International University of Rabat (UIR), Rabat, Morocco.