1. Gastroenterology and Hepatology Diseases Research Center, Qom University of Medical Sciences, Qom, Iran
2. Assistant Professor of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine, Gastrointestinal and Liver Diseases Research Center, Colorectal Research Center, Hazrat-e Rasool General Hospital, Iran University of Medical Sciences, Tehran, Iran
3. Student Research Committee, Faculty of Medicine, Qom University of Medical Sciences, Qom, Iran