1. Faculty of Medicine, Department of Pediatric, Lorestan University of Medical Sciences, Khorramabad, Iran
2. Fellowship of Pediatrics Gastroenterology, Pediatric Gastroenterology and Hepatology Research Center, Tehran University of Medical Sciences, Tehran, Iran
3. Student Researcher Committee, Lorestan University of Medical Sciences, Khoramabad, Iran
4. Departments of Biostatistics and Epidemiology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran
5. Department of the English Language, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran