[1] Saudi German Hosp, Neurol Dept, Madinah, Saudi Arabia
[2] Al Azhar Univ, Fac Med, Neurol Dept, Cairo, Egypt
[3] Ain Shams Univ, Fac Med, Neurol Dept, Cairo, Egypt
[4] Tanta Univ, Fac Med, Neurol Dept, Tanta, Egypt
[5] Saudi German Hosp, Neurol Dept, Jeddah, Saudi Arabia
[6] Univ Alberta, Dept Med, Div Neurol, Edmonton, AB, Canada
[7] 11884 AL Mokha AL Daem St, Cairo, Egypt
[8] 11887 Ramsis St, Cairo, Egypt
[9] 15435 Abyar Ali,Al Jameaat Rd, Madinah, Saudi Arabia
[10] 21461-4th Batargee ST, Jeddah, Saudi Arabia
[11] 7-112F Clin Sci Bldg, Edmonton, AB T6G 2R3, Canada