1. Department of Clinical Medicine and Surgery, Division of HPB, Minimally Invasive and Robotic Surgery, Transplantation Service, Federico II University Hospital, Naples, Italy
2. Division of Hepatobiliary Surgery and Liver Transplantation, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
3. Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
4. Department of Surgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seoul, Korea
5. Department of General Surgery, Digestive Disease, and Surgery Institute, Lerner College of Medicine, Cleveland Clinic, Cleveland, Ohio, USA
6. Department of Surgery, Division of Hepatobiliary Pancreatic Surgery, Yonsei University College of Medicine, Seoul, South Korea
7. Department of Surgery, National Taiwan University Hospital, Taipei