1. Division of HPB, Minimally Invasive and Robotic Surgery, Department of Clinical Medicine and Surgery, Federico II University Hospital, Naples, Italy
2. Department of Human Structure and Repair, Ghent University, Ghent, Belgium
3. Centre for Advanced Treatment of Hepato-Biliary-Pancreatic Diseases, Ageo Central General Hospital, Tokyo, Japan
4. Department of Surgery, Fujita Health University Hospital, Toyoake, Japan
5. Hepatobiliary Surgery Division, San Raffaele Hospital, Milan, Italy
6. Department of Surgery, Institute of Gastroenterology, Tokyo Women’s Medical University, Tokyo, Japan
7. Department of Hepato-Biliary-Pancreatic Surgery and Liver Transplantation, Istituto Nazionale Tumori, Milan, Italy
8. Biostatistics Department, Sapienza University of Rome, Rome, Italy
9. Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul,South Korea
10. Department of Hepatopancreatobiliary and Transplant Surgery, Singapore General Hospital, Singapore
11. Department of Surgery, Osaka City University Hospital, Osaka, Japan
12. Department of Surgery, Kansai Rosai Hospital, Amagasaki, Japan
13. Department of General and Hepato-Biliary-Pancreatic Surgery, Liver Transplantation Service, San Camillo Forlanini Hospital, Rome, Italy
14. Department of Surgery, Mauriziano Hospital, Turin, Italy
15. Division of Hepatobiliary and Pancreatic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
16. Department of General Surgery, Humanitas University and Research Hospital, IRCCS, Milan, Italy
17. Department of Public Health, Federico II University, Naples, Italy
18. Division of Hepato-Biliary-Pancreatic and Liver Transplantation, Queen Mary Hospital, University of Hong Kong, Hong Kong, China
19. Department of Surgery, Toho University of Tokyo, Tokyo, Japan
20. Department of Surgery, Osaka City General Hospital, Osaka, Japan