1. Department of Public Health, Dokkyo Medical University School of Medicine
2. Ibaraki Health Plaza
3. Ibaraki Health Service Association
4. Department of Public Health Medicine, Faculty of Medicine, and Health Services Research and Development Center, University of Tsukuba
5. Public Health, Department of Social Medicine, Osaka University Graduate School of Medicine
6. Department of Health and Welfare, Ibaraki Prefectural Office
7. Office of Epidemiology, Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University