1. Kathmandu University School of Medical Sciences Dhulikhel Nepal
2. Tribhuvan University Institute of Medicine Maharajgunj Nepal
3. Isfahan Neuroscience Research Center Isfahan Iran
4. Rochester General Hospital Rochester New York USA
5. Department of Neurology Jacobs Comprehensive MS Treatment and Research Center Jacobs School of Medicine and Biomedical Sciences University at Buffalo State University of New York Buffalo New York USA