1. Neurosciences Research Center, Neurology Department, Poursina Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran;
2. Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, Amiralmomenin Hospital, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran;
3. Student Research Committee, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran;
4. Social determinants of health research Center, Department of health education & Promotion, School of health, Guilan University of Medical Sciences, Rasht, Iran