1. Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
2. Social Determinants of Health Research Center, Health Research Institute, Yasuj University of Medical Sciences, Yasuj, Iran
3. Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Rasht, Iran
4. Division of GI/Liver, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
5. Social Determinants of Health Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
6. Department of Social Medicine, Jahrom University of Medical Sciences, Jahrom, Iran
7. Department of Epidemiology, Non-communicable Diseases Research Center, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran