1 Department of Neurology, Isfahan University of Medical Sciences, Iran; Isfahan Research Committee of Multiple Sclerosis, Alzahra Research Institute, Alzahra hospital, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran.
2 Isfahan Multiple Sclerosis Center, Isfahan, Iran; Isfahan Research Committee of Multiple Sclerosis, Alzahra Research Institute, Alzahra hospital, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran. Electronic address: sabetifateme@yahoo.com.