1. Departmentof Mental Health and Psychiatric Nursing, Tokyo Medical and Dental University, Tokyo, Japan
2. Health Promotion Center, Fukushima Medical University, Fukushima, Japan
3. Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
4. Department of Public Health, Kitasato University School of Medicine, Kanagawa, Japan
5. Department of Public Mental Health Research, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan