1. Department of Gastroenterology, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
2. Birjand Science and Research Branch, Islamic Azad University, Birjand, Iran
3. Student Research Committee, Birjand University of Medical Sciences, Birjand, Iran
4. Department of Biology, Faculty of Sciences, University of Birjand, Birjand, Iran
5. Social Determinants of Health Research Center, Department of Epidemiology and Biostatistics, Faculty of Health, Birjand University of Medical Sciences, Birjand, Iran