1. Department of Health ManagementNishinihon Occupational Health Service CenterKitakyushuJapan
2. Occupational Health Training CenterUniversity of Occupational and Environmental HealthKitakyushuJapan
3. The Research Group on Occupational Health for Health Care WorkersJapan Society for Occupational HealthJapan
4. Bureau of International Health CooperationNational Center for Global Health and MedicineTokyoJapan
5. College of Public Health, Medical and Veterinary Sciences, James Cook UniversityTownsvilleAustralia