1. Department of Preventive Cardiology, National Cardiovascular Center, Osaka
2. Department of Internal Medicine, Hanwa Daini Senboku Hospital, Osaka
3. Department of Public Health Medicine, Major of Social and Environmental Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki-ken
4. Department of Hygiene/Public Health, Faculty of Medicine, Kagawa University, Kagawa-ken
5. National Institute of Health and Nutrition, Tokyo
6. Department of Public Health, University of Ehime, Ehime
7. Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo, Japan.