[1] Univ Limoges, CHU Limoges, Inserm,Inst Epidemiol & Trop Neurol,Omega Hlth, U1094,IRD U270,EpiMaCT Epidemiol Chron Dis Trop Z, Limoges, France
[2] Lebanese Amer Univ, Sch Pharm, Byblos, Lebanon
[3] Amiri Hosp, Kuwait, Kuwait
[4] Ibn Sina Hosp, Kuwait, Kuwait
[5] Baghdad Med City Teaching Hosp, Baghdad, Iraq
[6] Amer Univ Beirut, Nehme & Therese Tohme Multiple Sclerosis Ctr, Med Ctr, Beirut, Lebanon
[7] Rashid Hosp, MS Dept, Dubai, U Arab Emirates
[8] Dubai Hlth Author, Dubai Med Coll, Dubai, U Arab Emirates
[9] Royal Hosp, Dept Neurol, Muscat, Oman
[10] Sultan Qaboos Univ, Neurol Unit, Dept Med, Coll Med & Hlth Sci, Muscat, Oman
[11] Sultan Qaboos Univ, Sultan Qaboos Univ Hosp, Muscat, Oman
[12] Razi Univ Hosp Mannouba, Clin Invest Ctr Neurosci & Mental Health, Dept Neurol, LR18SP03, Tunsi, Tunisia
[13] Med City, Riyadh, Saudi Arabia
[14] King Saud Bin Abdulaziz Univ Hlth Sci, Coll Med, Jeddah, Saudi Arabia
[15] Minist Natl Guard Hlth Affairs, Dept Neurosci, Jeddah, Saudi Arabia
[16] King Abdullah Int Med Res Ctr, Jeddah, Saudi Arabia
[17] Lebanese Univ, Fac Med Sci, Beirut, Lebanon
[18] Harley St Med Ctr, Neurol Inst, Abu Dhabi, U Arab Emirates
[19] Al Balqa Appl Univ, Fac Med, Al Salt 19117, Jordan
[20] Lebanese Univ, Fac Pharm, Beirut, Lebanon
[21] Natl Inst Publ Hlth Clin Epidemiol & Toxicol INSP, Beirut, Lebanon
[22] Lebanese Amer Univ, Sch Med, Byblos, Lebanon
[23] Univ Nicosia, Sch Med, Dept Primary Care & Populat Hlth, CY-2417 Nicosia, Cyprus