1. Professor, Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
2. Professor, Department of Biostatistics, Shiraz University of Medical Sciences, Shiraz, Iran
3. Assistant Professor, Gastroenterohepatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
4. Research Assistant, Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran