1 Isfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Neurology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
2 Isfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Neurology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran; Universal Council of Epidemiology (UCE) Universal Scientific Education and Research Network (USERN), Tehran University of Medical Sciences, Tehran, Iran.
3 Universal Council of Epidemiology (UCE) Universal Scientific Education and Research Network (USERN), Tehran University of Medical Sciences, Tehran, Iran.
4 Isfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Universal Council of Epidemiology (UCE) Universal Scientific Education and Research Network (USERN), Tehran University of Medical Sciences, Tehran, Iran.
5 Isfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
6 Isfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Neurology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran. Electronic address: shaygannejad@med.mui.ac.ir.
7 University of Toronto, St. Michael's Hospital Multiple Sclerosis clinic, Toronto, ON, Canada.