1. Department of Occupational Health Practice and Management Institute of Industrial Ecological Science, University of Occupational and Environmental Health Kitakyushu Japan
2. Advanced Occupational Health Research and Consulting (AORC), Ltd. Tokyo Japan
3. HOYA, Ltd. Tokyo Japan
4. Komatsu, Ltd. Tokyo Japan
5. Brother Industries, Ltd. Nagoya Japan
6. Department of Community Medicine, Faculty of Medicine Universitas Indonesia Jakarta Indonesia