1. Department of Surgery 1, School of Medicine University of Occupational and Environmental Health Kitakyushu Japan
2. Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences University of Occupational and Environmental Health Kitakyushu Japan
3. Department of Health Policy and Informatics Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences Tokyo Japan
4. Department of Preventive Medicine and Community Health, School of Medicine University of Occupational and Environmental Health Kitakyushu Japan