1. Gastroenterology and Hepatology DepartmentSaint André HospitalCHU Bordeaux and Bordeaux Segalen UniversityBordeauxFrance
2. Barts and The London School of Medicine and DentistryWingate Institute for NeurogastroenterologyQueen Mary University of LondonUK
3. Division of GastroenterologyUniversity Clinic of Visceral Surgery and MedicineBern University HospitalInselspital BernBernSwitzerland
4. Department of SurgeryNorth Tyeneside HospitalDurham UniversityNorthumbria HealthcareUnited Kingdom
5. Department of SurgeryGastrocentrumKarolinska University HospitalStockholmSweden