1 Department of Internal Medicine, School of Medicine, Qom University of Medical Sciences, Qom, Iran
2 Student Research Committee, Qom University of Medical Sciences, Qom, Iran
3 Gastroenterology and Hepatology Diseases Research Center, Qom University of Medical Sciences, Qom, Iran; Clinical Research Development Center, Shahid Beheshti Hospital, Qom University of Medical Sciences, Qom, Iran. jvafaeemanesh@yahoo.com