1. Department of Surgery, Uijeongbu St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
2. Department of Surgery, Chonnam National University Hwasun Hospital and Medical School, Hwasun, Korea
3. National Evidencebased Healthcare Collaborating Agency, Seoul, Korea
4. Department of Surgery, Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Korea
5. Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
6. Department of Surgery, Chungnam National University Hospital, Daejeon, Korea
7. Department of Surgery, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
8. Department of Surgery, Ain Hospital, Incheon, Korea
9. Department of Surgery, Dongnam Institute of Radiological and Medical Science, Busan, Korea
10. Department of Anesthesiology and Pain Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
11. Department of Surgery and Cancer Research Institute, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
12. Center for Liver and Pancreatobiliary Cancer, National Cancer Center, Goyang, Korea