1 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
2 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Hepato-Biliary-Pancreatic Medicine, The Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan. Electronic address: hamada-tky@umin.ac.jp.
3 Department of Statistics and Operations Research, Tel Aviv University, Tel Aviv, Israel.
4 Department of Radiology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
5 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Internal Medicine, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan.
6 School of Medicine, University of Auckland, Auckland, New Zealand.
7 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Endoscopy and Endoscopic Surgery, The University of Tokyo Hospital, Tokyo, Japan.
8 Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan; Department of Pathology, Keio University School of Medicine, Tokyo, Japan.
9 Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Clinical Oncology, The University of Tokyo Hospital, Tokyo, Japan.
10 Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
11 Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.