1. National Institute of Occupational Safety and Health; Kawasaki Japan
2. Department of Public Health; Kitasato University School of Medicine; Sagamihara Japan
3. Department of Health Policy and Management; University of Occupational and Environmental Health; Kitakyushu Japan
4. Department of Mental Health; Institute of Industrial Ecological Sciences; University of Occupational and Environmental Health; Kitakyushu Japan
5. Department of Mental Health; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
6. Kosugi Health Management Office; Toyama Japan