1. Surgical Digestive Diagnostic and Interventional Endoscopy“Niguarda‐Cà Granda” HospitalMilanItaly
2. Gastroenterology and Endoscopy Unit“Nuovo S. Agostino” HospitalModenaItaly
3. Gastroenterology and Digestive Endoscopy“Nuovo Regina Margherita” HospitalRomeItaly
4. Digestive Physiopathology UnitBaggiovara HospitalModenaItaly
5. Department of Clinical Medicine and SurgeryUnit of Surgical Digestive EndoscopyFederico II University of NaplesNaplesItaly