1. Department of Hepatobiliary and Pancreatic Surgery National Cancer Center Hospital Tokyo Japan
2. Department of Medical Surgical Science and Translational Medicine Sapienza University of Rome Rome Italy
3. Department of Hepatobiliary and Pancreatic Surgery Graduate School of Medicine Tokyo Medical and Dental University Tokyo Japan
4. Department of Surgery Institute of Gastroenterology Tokyo Women's Medical University Tokyo Japan
5. Department of Surgery Seoul National University College of Medicine Seoul Korea
6. Department of Surgery Yonsei University College of Medicine Seoul Korea
7. Department of Gastrointestinal and Pediatric Surgery Tokyo Medical University Tokyo Japan
8. First Department of Surgery Kagoshima University School of Medicine Kagoshima Japan
9. Minimally Invasive Surgery Division Department of Surgery Faculty of Medicine Siriraj Hospital Mahidol University Bangkok Thailand
10. Department of Gastroenterological Surgery Yokohama City University Graduate School of Medicine Yokohama Japan
11. Department of Surgery and Oncology Graduate School of Medical Sciences Kyushu University Fukuoka Japan