1. Department of Urology, Graduate School of Medical Science Kyoto Prefectural University of Medicine Kyoto Japan
2. Department of Urology Japanese Red Cross Kyoto Daiichi Hospital Kyoto Japan
3. Department of Epidemiology for Community Health and Medicine, Graduate School of Medical Science Kyoto Prefectural University of Medicine Kyoto Japan
4. Department of Epidemiology Radiation Effects Research Foundation Hiroshima Japan
5. Department of Public Health Sapporo Medical University School of Medicine Sapporo Japan
6. Department of Public Health and Health Policy, Graduate School of Biomedical and Health Sciences Hiroshima University Hiroshima Japan
7. Department of Preventive Medical Sciences Fujita Health University School of Medical Sciences Toyoake Japan
8. Department of Preventive Medicine/ Biostatistics and Medical Decision Making Nagoya University Graduate School of Medicine Nagoya Japan
9. Department of Public Health Hokkaido University Graduate School of Medicine Sapporo Japan