1. Department of Pediatric Gastroenterology, Abuzar Children’s Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
2. Alimentary Tract Research Center, Clinical Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
3. Department of Pediatric Gastroenterology, Arak University of Medical Sciences, Arak, Iran