1. aDepartment of Surgery, Centre for Digestive Diseases, Karolinska University Hospital, CLINTEC, Karolinska Institutet, Stockholm, Sweden
2. bDepartment of Medicine, Haukeland University Hospital, Bergen, Norway
3. cHôtel Dieu-CHU University de Nantes, Nantes, France
4. dNorth Tyneside Hospital, North Shields, UK
5. eSana Klinikum Offenbach, Teaching Hospital of the Goethe University Frankfurt, Frankfurt, Germany
6. fUniversity of Genoa and IRCCS S. Martino/IST, Genoa, Italy
7. gAstraZeneca R&D, Mölndal, Sweden