Gastroenterology Unit, Department of Medical and Surgical Sciences, University of Foggia, Italy. Gastrointestinal Endoscopy Unit, Department of Surgery, Pisa University Hospital, Pisa, Italy. General Surgery Unit, Department of Medical and Surgical Sciences, University of Foggia, Italy. Gastroenterology and Hepatology, Brooklyn Hospital Medical Center, Brooklyn, New York, United States. Gastroenterology and Hepatology, University of Utah Health, Salt Lake City, Utah, United States. Gastroenterology Unit, CHI Health Creighton University Medical Center, Omaha, Nebraska, United States.