1. Division of Gastroenterology and Hepatology, University of Utah Health, Salt Lake City, UT 84132, USA
2. Department of Medicine, Jersey Shore University Medical Center, Neptune City, NJ 07753, USA
3. Section of Gastroenterology, Department of Medical Sciences, University of Foggia, 71100 Foggia, Italy
4. Gastroenterology & Hepatology, University of Nebraska Medical Center, Omaha, NE 68198, USA
5. Division of Digestive Diseases, University of Cincinnati, Cincinnati, OH 45219, USA
6. Division of Gastroenterology & Hepatology, CHI Health Creighton University Medical Center, Omaha, NE 68124, USA
7. Gastroenterology and Endoscopy Unit, S. Elia-Raimondi Hospital, 93100 Caltanissetta, Italy
8. Endoscopy Unit, Hospital Sandro Pertini, 00157 Rome, Italy
9. Division of Gastroenterology, Geisinger Commonwealth School of Medicine, Scranton, PA 18509, USA
10. Department of Gastroenterology, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India
11. Division of Gastroenterology, Stanford University, Stanford, CA 94305, USA