1 Department of Neurology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.
2 Department of Neurology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
3 Department of Biostatistics, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
4 Department of Neurology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
5 Department of Anatomical Sciences, School of Medicine, Neurosciences Research Center, Alzahra Hospital, Isfahan University of Medical Sciences, Isfahan, Iran.