1. Department of Surgery and Cancer Research Institute; Seoul National University College of Medicine; Seoul South Korea
2. Department of Surgery; Daejeon St. Mary's Hospital, College of Medicine; The Catholic University of Korea; Daejeon South Korea
3. School of Medicine; Kyungpook National University; Daegu South Korea
4. Department of Digestive Surgery; Faculty of Medicine; Catholic University of Chile; Santiago Chile
5. Department of Pathology; Faculty of Medicine; Catholic University of Chile; Santiago Chile
6. Department of Surgery; Samsung Medical Center; Sungkyunkwan University College of Medicine; Seoul South Korea
7. Division of Hepatobiliary and Pancreatic Surgery; Department of Surgery; Keimyung University Dongsan Medical Center; Daegu South Korea
8. Department of Surgery; Gyeongsang National University College of Medicine; Jinju South Korea
9. Surgery Department; Universidad de la Frontera; Temuco Chile
10. Department of Surgery; Center for Liver Cancer; National Cancer Center; Goyang South Korea
11. Department of Surgery; Kansai Medical University; Hirakata Japan
12. Department of Gastroenterological Surgery; Graduate School of Medicine; Yokohama City University; Yokohama Japan
13. Department of Gastroenterological Surgery; Dokkyo Medical University; Tochigi Japan
14. Division of Digestive and General Surgery; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
15. Division of Hepato-Biliary-Pancreatic Surgery; Department of Surgery; Kobe University Graduate School of Medicine; Kobe Japan
16. Department of Pathology; Koc University; Istanbul Turkey
17. Department of Pathology; Emory University School; Atlanta GA USA