1. Department of Nursing, Baika Women’s University, Osaka, Japan
2. Department of Welfare System and Health Science, Okayama Prefectural University, Soja, Japan
3. Department of Nursing, University of Shimane, Izumo, Japan
4. Department of Public Health, Graduate School of Nursing, Sanyo Gakuen University, Okayama, Japan
5. Department of Public Health, Kitasato University School of Medicine, Sagamihara, Japan