1. Student Research Committee, School of Medicine, Kermanshah University of Medical Sciences , Kermanshah , Iran
2. Department of Immunology, School of Medicine, Kermanshah University of Medical Sciences , Kermanshah , Iran
3. Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences , Sari , Iran
4. Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences , Sari , Iran
5. Department of Neurology, School of Medicine, Farabi Hospital, Kermanshah University of Medical Sciences , Kermanshah , Iran