1. Isfahan Medical Students Research Center (IMSRC), Isfahan University of Medical Sciences, Isfahan, Iran;
2. Department of Immunology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran;
3. Department of Biostatistics, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran;
4. Department of Neurology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran;
5. Department of Neurology, Mayo Clinic, Rochester, New York, USA