1. Division of the Strategic Outcome Research Program for Cancer Control, Ministry of Health, Labour and Welfare Commission, Japan Cancer Society; Division of Exploratory Research, Institute of Medical Science, University of Tokyo, Tokyo, Japan
2. Division of Exploratory Research, Institute of Medical Science, University of Tokyo, Tokyo, Japan
3. Third Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan
4. Medical Information and System Research Center, Teikyo University School of Medicine, Tokyo, Japan