[1] St Joseph Univ, Hotel Dieu France Hosp, Beirut, Lebanon
[2] Specialized Med Ctr, Riyadh, Saudi Arabia
[3] Mohammed V Univ, Lab Biostat Clin Res & Epidemiol LBRCE, Fac Med & Pharm, Temara Hosp, Rabat, Morocco
[4] Univ Baghdad, Coll Med, Dept Med, Rheumatol Unit, Baghdad, Iraq
[5] King Faisal Specialist Hosp & Res Ctr, Jeddah, Saudi Arabia
[6] Tunis El Manar Univ, Dept Rheumatol, UR17SP04, Fac Med Tunis,Kassab Inst Orthoped, Tunis, Tunisia
[7] Jaber Alahmed Alsabah Hosp, Dept Med, Rheumatol Unit, Kuwait, State Of Kuwait, Kuwait
[8] Douera Hosp, Fac Med, Dept Rheumatol, Blida, Algeria
[9] Cairo Univ, Rheumatol Dept, Cairo, Egypt
[10] Jordan Hosp, Amman, Jordan