1. Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tsukiji, Chuo-ku, Tokyo, Japan
2. Department of Diabetes, Metabolism, and Endocrinology, Ichikawa Hospital, International University of Health and Welfare, Kounodai, Ichikawa, Chiba, Japan
3. Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine, Yamadaoka, Suita-shi, Osaka, Japan