1. Division of Gastroenterology and Hepatology, Johns Hopkins Hospital, Baltimore, Maryland, United States
2. Greater Houston Gastroenterology, Houston, Texas, United States
3. Division of Gastroenterology and Hepatology, Montefiore Medical Center, New York City, New York, United States
4. Division of Gastroenterology and Hepatology, Hofstra-Northwell School of Medicine, Manhasset, New York, United States
5. Division of Gastroenterology and Hepatology, Hospital of Salerno, G. Fucito Center, Mercato San Severino, Italy
6. Department of Endoscopy and Gastroenterology, Limoges Dupuytren Hospital, Lyon, France
7. Division of Gastroenterology, Henry Ford Hospital, Detroit, Michigan, United States
8. Digestive Disease Institute at Virginia Mason Medical Center, Seattle, Washington, United States
9. Department of Medicine, Boston University School of Medicine, Boston, Massachusetts, United States