1. Gastroenterology Unit, Department of Surgical and Medical Sciences, University of Foggia, 71122 Foggia, Italy
2. Gastroenterology Unit, CHI Health Creighton University Medical Center, Omaha, NE 68007, USA
3. Department of Gastroenterology, Hepatopancreatology, and Digestive Oncology, CUB Erasme Hospital, Université Libre de Bruxelles (ULB), 1050 Brussels, Belgium
4. Gastroenterology and Hepatology, University of Utah Health, Salt Lake City, UT 801385, USA
5. Gastroenterology Unit, Hospital of Imola, 40026 Imola, Italy
6. Gastroenterology and Digestive Endoscopy Unit, Department of Medicine, The Pancreas Institute, University Hospital of Verona, 37100 Verona, Italy
7. Hepatogastroenterology Unit, Second Department of Internal Medicine-Propaedeutic, Medical School, “Attikon” University General Hospital, National and Kapodistrian University of Athens, 10431 Athens, Greece
8. Gastrointestinal Endoscopy Unit, Humanitas Mater Domini, Via Gerenzano 2, 21053 Castellanza, Italy
9. Department of Gastroenterology, St. Savvas Oncology Hospital of Athens, 10431 Athens, Greece
10. Gastroenterology Unit, Department of Internal Medicine II, “Victor Babes” University of Medicine and Pharmacy, 300226 Timisoara, Romania