Faculty of Medicine, Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran. Department of Neurology, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran. NeuroImmunology Research Association (NIRA), Universal Scientific Education and Research Network (USERN), Tehran, Iran. Department of Neurology, Loghman Hakim Hospital, Shaheed Beheshti University of Medical Sciences, Tehran, Iran. Pediatrics Center of Excellence, Department of Pediatric Neurology, Children's Medical Center, Growth and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran. Department of Paediatric Neurology, Golestan Medical, Educational, and Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Psychiatry and Psychology Research Center, Tehran University of Medical Sciences, Tehran, Iran. Department of Paediatric Infectious Disease, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.