1. Department of Health and Social Services, Ibaraki Prefectural Government
2. Public Health, Department of Social and Environmental Medicine, Osaka University, Graduate School of Medicine
3. Department of Pubic Health Medicine, Dokkyo University School of Medicine
4. Ibaraki Health Plaza, Ibaraki Health Service Association
5. Department of Pubic Health Medicine, Graduate school of Comprehensive Human Sciences, University of Tsukuba