1. Department of Environmental Health, School of Medicine, University of Occupational and Environmental Health , Fukuoka, Japan
2. Department of Occupational Hygiene, School of Health Sciences, University of Occupational and Environmental Health , Fukuoka, Japan
3. Department of Epidemiology and Preventive Medicine, Kagoshima University Graduate School of Medical and Dental Sciences , Kagoshima, Japan
4. Section of Postgraduate Guidance School of Medicine, University of Occupational and Environmental Health , Fukuoka, Japan
5. Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University , Hiroshima, Japan
6. Department of Occupational Toxicology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health , Fukuoka, Japan
7. Department of Respiratory Medicine, School of Medicine, University of Occupational and Environmental Health , Fukuoka, Japan
8. Department of Occupational and Community Health Nursing, School of Health Sciences, University of Occupational and Environmental Health , Fukuoka, Japan
9. Department of Environment and Public Health, National Institute for Minamata Disease , Kumamoto, Japan