1. Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3. Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
4. Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. Department of Gastroenterology and Hepatology, Tehran University of Medical Sciences, Tehran, Iran
6. Gastrointestinal and Liver Diseases Research Center, Iran University of Medical Sciences, Tehran, Iran
7. Department of Gastroenterology and Hepatology, School of Medicine, Shahid Modarres Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
8. Faculty of Mashhad Branch, Islamic Azad University, Mashhad, Iran
9. Rajaie Cardiovascular Medical and Research Center, Tehran, Iran