1. Department of Surgery, Oncology and Gastroenterology University of Padua Padua Italy
2. Department of Surgery Wexner Medical Center at The Ohio State University Columbus Ohio
3. Biostatistic Unit Padua University Padua Italy
4. Gastroenterology Unit, Department of Internal Medicine IRCCS‐Azienda Ospedaliera Universitaria San Martino‐IST, University of Genoa Genoa Italy
5. Division of Internal Medicine, Department of Medical and Surgical Sciences Alma Mater Studiorum–University of Bologna Bologna Italy
6. Division of Surgery San Marco Hospital Zingonia Italy
7. Division of Internal Medicine and Gastroenterology, Complesso Integrato Columbus Università Cattolica del Sacro Cuore Rome Italy
8. Division of Medicine Bolognini Hospital Seriate Italy
9. Division of Gastroenterology Belcolle Hospital Viterbo Italy
10. Division of Radiology, Department of Medicine Fatebenefratelli Hospital Milan Italy
11. Division of Gastroenterology and Metabolic Diseases University Hospital of Pisa Pisa Italy
12. Division of Gastroenterology, Biomedical Department of Internal and Specialistic Medicine University of Palermo Palermo Italy
13. Division of Internal Medicine 2 Ospedali Riuniti Villa Sofia‐Cervello Palermo Italy
14. Internal Medicine and Hepatology, Department of Experimental and Clinical Medicine University of Firenze Firenze Italy
15. Division of Gastroenterology Bolzano Regional Hospital Bolzano Italy
16. Division of Gastroenterology, Department of Medicine and Surgery University of Naples, "Federico II" Naples Italy
17. Department of Molecular Medicine University of Padova Padova Italy
18. Division of Internal Medicine and Gastroenterology Policlinico Gemelli, Università Cattolica del Sacro Cuore Roma Italy
19. Division of Gastroenterology Polytechnic University of Marche Ancona Italy
20. Department of Internal Medicine Ospedale per gli Infermi di Faenza Faenza Italy
21. Division of Infectious Diseases and Hepatology Azienda Ospedaliero‐Universitaria di Parma Parma Italy
22. Gastroenterology Unit Ospedale Sacro Cuore Don Calabria Negrar Italy
23. Hepato‐Gastroenterology Unit, Department of Clinical Medicine and Surgery University of Naples "Federico II" Napoli Italy
24. Gastroenterology Unit, Department of Surgical and Medical sciences Alma Mater Studiorum–Università of Bologna Bologna Italy
25. Division of Semeiotics, Department of Medical and Surgical Sciences Alma Mater Studiorum–University of Bologna BolognaItaly