Document Type: Letter to the Editor

Authors

1 Department of Neurology, School of 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