1. Gastroenterology and Hepatology Research Center, Internal Medicine Ward, Shiraz Medical School, Shiraz University of Medical Sciences, Iran
2. Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz, Iran
3. Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
4. Department of Pathology , Shiraz Medical School, Shiraz University of Medical Sciences,Shiraz, Iran
5. Health Policy Research Center, Institute of Health, Shiraz University of Medical Sciences, Shiraz, Iran