1. Department of Epidemiology and Prevention, National Center for Global Health and Medicine
2. Hitachi Health Care Center, Hitachi, Ltd.
3. Mitsui Chemicals, Inc.
4. NIPPON STEEL CORPORATION, EAST NIPPON WORKS
5. Mitsubishi Fuso Truck and Bus Corporation
6. Hidaka Tokushukai Hospital
7. YAMAHA CORPORATION
8. Furukawa Electric Co., Ltd.
9. East Japan Works (Keihin), JFE Steel Corporation
10. All Japan Labour Welfare Foundation
11. Department of Global Public Health, Faculty of Medicine, University of Tsukuba
12. OH Support
13. Azbil Corporation
14. Healthplant Co., Ltd.
15. Tokyo Gas Co., Ltd.
16. KUBOTA Corporation
17. Division of Chemical Information, National Institute of Occupational Safety and Health