Affiliation: | 1. Division of Hepatobiliary and Pancreas, Department of Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Korea 2. Division of Hepatobiliary and Pancreas, Department of Surgery, Yonsei University Health System, Yonsei University College of Medicine, Ludlow Faculty Research Building, 50 Yonsei-ro, Seodaemoon-gu, Seoul, 120-752, Korea
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