1. Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
2. Iranian Center of Neurological Research, Department of Neurology, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran
3. Department of Neurology and MS Research Center, Neuroscience Institute, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran
4. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
5. Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran