1Department of Adult Nursing, Nursing Course, School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-Ku, Yokohama, 236-0004 Japan.
2Division of Development Sciences for Practical Nursing, Department of Nursing, Faculty of Health Sciences, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, 654-0142 Japan.