1. Digestive Disease Research Center, Digestive Disease Research Institute, Tehran University of Medical Sciences, Tehran, Iran
2. Digestive Oncology Research Center, Digestive Diseases Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
3. Research Center for Chronic Inflammatory Diseases, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
4. Clinical Research Development Unit, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
5. School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
6. Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Center, Tehran, Iran
7. Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Guilan, Iran
8. Gastroenterology and Hepatology Diseases Research Center, Qom University of Medical Science, Qom, Iran
9. Gut and Liver Research Center, Non-communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
10. Digestive Diseases Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
11. Department of Gastroenterology and Hepatology, Mashhad University of Medical Sciences, Mashhad, Iran
12. Golestan Research Center of Gastroenterology, Golestan University of Medical Science, Gorgan, Iran
13. Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
14. Noncommunicable Diseases Research Center, Bam University of Medical Sciences, Bam, Iran
15. Isfahan University of Medical Sciences, Isfahan, Iran
16. Maternal and Childhood Obesity Research center, Urmia University of Medical Sciences, Urmia, Iran
17. Shahid Sadoughi University, Yazd, Iran