1. Department of GastroenterologyUniversity Hospital RijekaRijekaCroatia
2. Digestive and Liver Disease UnitSant’Andrea HospitalFaculty of Medicine and Psychology‘Sapienza’ University of RomeRomeItaly
3. Department of SurgeryHelsinki University HospitalUniversity of HelsinkiHelsinkiFinland
4. Gastroenterology DepartmentAlicante University General HospitalAlicante Institute for Health and Biomedical Research (ISABIAL-FISABIO Foundation)AlicanteSpain