1. Department of Otorhinolaryngology Neuroscience Research Center School of Medicine Golestan University of Medical Sciences Gorgan Iran
2. Department of Health Management and Social Development Research Center Faculty of Health Golestan University of Medical Sciences Gorgan Iran
3. Department of Golestan Research Centre of Gastroenterology and Hepatology Golestan University of Medical Sciences Gorgan Iran
4. Department of Microbiology School of Medicine Infectious Diseases Research Center Golestan University of Medical Sciences Gorgan Iran
5. Department of Statistics and Information Technology Management Golestan University of Medical Sciences Gorgan Iran
6. Department of Physiology School of Medicine Neuroscience Research CenterGolestan University of Medical Sciences Gorgan Iran