[1] King Abdulaziz Univ, King Abdulaziz Univ Hosp, Fac Med, Neurosci Unit,Neurol Div,Internal Med Dept, Jeddah, Saudi Arabia
[2] King Abdulaziz Univ, King Fahad Med Res Ctr, Neuromuscular Unit, Jeddah, Saudi Arabia
[3] King Abdulaziz Univ, King Abdulaziz Univ Hosp, Fac Med, Neurol Div,Internal Med Dept, Jeddah, Saudi Arabia
[4] Int Med Ctr, Neurol Dept, Jeddah, Saudi Arabia
[5] King Abdulaziz Univ, King Abdulaziz Univ Hosp, Fac Med, Pediat Dept, Jeddah, Saudi Arabia
[6] King Faisal Specialist Hosp & Res Ctr, Neurosci Dept, Riyadh, Saudi Arabia
[7] King Saud bin Abdulaziz Univ Hlth Sci, Natl Guard Hosp, King Abdulaziz Med City, Neurol Dept, Riyadh, Saudi Arabia
[8] King Faisal Specialist Hosp & Res Ctr, Neurosci Dept, Jeddah, Saudi Arabia
[9] King Saud Univ, King Saud Univ Med City, Dept Internal Med, Riyadh, Saudi Arabia