1. Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center Research Institute for Gastroenterology and Liver Diseases Shahid Beheshti University of Medical Sciences Tehran Iran
2. Gastroenterology and Liver Diseases Research Center Research Institute for Gastroenterology and Liver Diseases Shahid Beheshti University of Medical Sciences Tehran Iran
3. Molecular Genetics Department Genomic Research Center Shahid Beheshti University of Medical Sciences Tehran Iran
4. Department of Genetics Faculty of Advanced Science and Technology Tehran Medical Sciences Islamic Azad University Tehran Iran