1. Gastroenterology and Hepatology Department, Faculty of Medicine, Ghaem Hospital, Mashhad, Iran
2. Digestive Disease Research Center, Digestive Disease Research Institute, Tehran University of Medical Sciences, Tehran, Iran
3. Gastrointestinal and Liver Diseases Research Center, Guilan University of Medical Sciences, Rasht, Iran
4. Gut and Liver Research Center, Mazandaran University of Medical Sciences, Sari, Iran
5. Liver and Digestive Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran
6. Gastroenterology and Hepatology Department, Digestive Diseases Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
7. Shahid Mohammadi Hospital, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
8. Hematology, Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
9. Mashhad University of Medical Sciences, Mashhad, Iran
10. The Henry D. Janowitz Division of Gastroenterology Icahn School of Medicine at Mount Sinai, New York, USA
11. Sasan Alborz Biomedical Research Center, Masoud Gastroenterology and Hepatology Center, Tehran, Iran