1. Department of Public HealthOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesJapan
2. Department of Welfare System and Health ScienceOkayama Prefectural UniversityJapan
3. Department of Community Health NursingNiimi CollegeJapan
4. Occupational Health Training CenterUniversity of Occupational and Environmental HealthJapan
5. Faculty of NursingBaika Women's UniversityJapan