[1] Univ Tehran Med Sci, Fac Med, Tehran, Iran
[2] Univ Tehran Med Sci, Ziaeian Hosp, Dept Neurol, Tehran, Iran
[3] St Vincents Hosp, Neurosci Dept, Melbourne, Vic, Australia
[4] Iran Univ Med Sci, Fac Med, Tehran, Iran
[5] Iran Univ Med Sci, Sch Med, Firoozgar Hosp, Neurol Dept, Shahid Hemmat Highway, Tehran, Iran