1. Department of Public HealthOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesJapan
2. Occupational Health Training CenterUniversity of Occupational and Environmental HealthJapan
3. Department of Welfare System and Health ScienceOkayama Prefectural UniversityJapan
4. Department of PsychologyFukuyama UniversityJapan
5. Department of Environmental and Preventive MedicineGraduate School of Medical Science, Kanazawa UniversityJapan
6. Department of English CommunicationChugoku Junior CollegeJapan
7. Department of PsychologyHiroshima University Graduate School of EducationJapan