1. Department of Statistics, Radiation Effects Research Foundation, 5-2 Hijiyama-koen, Minami-ku, Hiroshima 732-0815, Japan
2. Department of Geriatric Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI 96817, USA
3. Department of Health Science, Shiga University of Medical Science, Otsu 520-2192, Japan
4. Department of Internal Medicine, Shiga University of Medical Science, Otsu 520-2192, Japan
5. Department of Hygiene and Preventive Medicine, Fukushima Medical University, Fukushima 960-1295, Japan
6. Department of Preventive Medicine and Public Health, Keio University, Tokyo 160-8582, Japan
7. The First Institute of Health Service, Japan Anti-Tuberculosis Association, Tokyo 101-0061, Japan