1. School of Nursing, Kitasato University , 2-1-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0329 , Japan
2. Department of Nursing, The Cardiovascular Institute , 3-2-19 Nishiazabu, Minato-ku, Tokyo , Japan
3. Department of Health Science, Kitasato University School of Allied Health Sciences , 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa , Japan
4. Department of Health, Medicine and Caring Sciences, Division of Nursing Sciences and Reproductive Health, Linköping University , Linköping SE-581 83 , Sweden
5. Department of Nursing, Tokyo Women’s Medical University Hospital , 8-1 Kawada-cho, Shinzyuku-ku, Tokyo , Japan