1 Division of Gastroenterology, Department of Medicine, Mater Dei Hospital, Msida, Malta.
2 Department of Gastroenterology, Porto Comprehensive Cancer Center Raquel Seruca, and RISE@CI-IPO (Health Research Network), Porto, Portugal.
3 MEDCIDS (Department of Community Medicine, Health Information, and Decision), Faculty of Medicine, University of Porto, Porto, Portugal.
4 2nd Department of Internal Medicine - Gastroenterology and Geriatrics, University Hospital Olomouc, Faculty of Medicine and Dentistry, Palacky University Olomouc, Olomouc, Czech Republic.
5 Department of Surgery, University Hospital Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
6 Department of Gastroenterology and Digestive Endoscopy, Masaryk Memorial Cancer Institute, Brno, Czech Republic.