1 Professor, Department of Neurology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran, Iran
2 Specialist in Ear, Nose, and Throat, Associate Professor, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran, Iran
3 Specialist in Digestive Diseases, Assistant Professor, Department of Gastroenterology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran, Iran
4 Specialist in Community Medicine, Associate Professor, Department of Community Medicine, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran, Iran
5 General Physician, Guilan University of Medical Sciences, Rasht, Iran, Iran
Readers' Comments