1. Digestive Endoscopy UnitDivision of GastroenterologyHumanitas Clinical and Research CenterMilanItaly
2. Department of Biomedical SciencesHumanitas UniversityMilanItaly
3. Department of Medical and Surgical SciencesS. Orsola‐Malpighi HospitalUniversity of BolognaBolognaItaly
4. Gastrointestinal Endoscopy UnitHumanitas Mater DominiCastellanzaItaly
5. School of MedicineUniversity of KansasKansas CityUSA
6. Veteran Affairs Medical CenterKansas CityUSA
7. Gastroenterology UnitKing Abdul Aziz University HospitalJeddahSaudi Arabia
8. Digestive Endoscopy UnitNuovo Regina Margherita HospitalRomeItaly