1. Hepatogastroenterology Division, Department of Precision Medicine, University of Campania Luigi Vanvitelli, 80138 Naples, Italy
2. Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
3. Esophagus and Stomach Organic Diseases Unit, IRCSS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy