1. Division of Hepatobiliary and Pancreas Department of Surgery Yonsei University College of Medicine Seoul, Korea; and Pancreaticobiliary Cancer Clinic Institute of Gastroenterology Yonsei University Health System Seoul, Korea
2. Division of Hepatobiliary and Pancreas Department of Surgery Yonsei University College of Medicine Seoul, Korea; Pancreaticobiliary Cancer Clinic Institute of Gastroenterology Yonsei University Health System Seoul, Korea; and Young Yonsei Pancreatic Tumor Study Group Seoul, Korea