1. Unité dʼEndoscopie Interventionnelle, Hôpital Privé des Peupliers, Ramsay Santé, Paris, France
2. Unit of Gastroenterology and Digestive Endoscopy, “F. Miulli” General Regional Hospital, Acquaviva delle Fonti
3. Unit of Hepato-Pancreatic-Biliary Surgery, “F. Miulli” General Regional Hospital, Acquaviva delle Fonti
4. Department of Clinical Medicine and Surgery, University of Naples “Federico II”, Naples, Italy