1. Graduate School of Health Sciences, Kobe University, 7-10-2 Tomogaoka, Suma-ku, Kobe 6540142, Japan
2. Faculty of Nursing, Osaka Shin-Ai Gakuin University, 6-2-28 Tsurumi, Tsurumi-ku, Osaka 5380053, Japan
3. Faculty of Nursing, Hyogo Medical University, 1-3-6 Minatojima, Chuo-ku, Kobe 6508530, Japan
4. School of Nursing, Takarazuka University, 1-13-16 Shibata, Kita-ku, Osaka 5300012, Japan