1. Department of Respiratory Medicine University of Occupational and Environmental Health Japan Kitakyushu City Japan
2. Department of Preventive Medicine and Community Health University of Occupational and Environmental Health Japan Kitakyushu City Japan
3. Department of Environmental Epidemiology University of Occupational and Environmental Health Japan Kitakyushu City Japan
4. Department of Health Policy and Informatics Tokyo Medical and Dental University Tokyo Japan
5. Department of Respiratory Medicine Nagasaki University Graduate School of Biomedical Sciences Nagasaki City Japan