1. Department of Medicine 1, Division of Endocrinology Friedrich‐Alexander University Erlangen‐Nuremberg Erlangen Germany
2. Department of Gastroenterology Santa Chiara Hospital, Azienda Provinciale per i Servizi Sanitari (APSS) Trento Italy
3. Institute of Pathology University of Bern Bern Switzerland
4. Department of Gastroenterology, University Hospital Gießen and Marburg, Marburg, Germany, Department of Surgery Charité Universitätsmedizin Berlin Germany
5. Department of Biomedical Sciences Humanitas University Milan Italy
6. IRCCS Humanitas Research Hospital Milan Italy
7. Division of Cancer Sciences University of Manchester/Department of Medical Oncology, The Christie NHS Foundation Trust Manchester UK
8. Department of Pathology Charité Universitätsmedizin Berlin Germany
9. Division of Gastrointestinal Medical Oncology and Neuroendocrine Tumours European Institute of Oncology IEO, IRCCS Milan Italy
10. Department of Internal Medicine Sector of Endocrinology Rotterdam The Netherlands
11. Department of Hepatology and Gastroenterology Campus Virchow‐Klinikum, Charité Universitätsmedizin Berlin Germany
12. Klinik für Allgemein‐, Viszeral‐ und Transplantationschirurgie, Universitätsklinikum Münster Münster Germany
13. Department of Surgery Campus Virchow‐Klinikum, Charité Universitätsmedizin Berlin Germany