1. College of Nursing Art and Science, University of Hyogo, 13-71 Kitaoji-cho, Akashi 673-0021, Japan
2. Graduate School of Nursing Sciences, St. Luke’s International University, 10-1 Akashi-cho, Chuo-ku, Tokyo 104-0044, Japan
3. Nursing Department, Hyogo Prefectural KOBE Children’s Hospital, 1-6-7 Minatojima Minamimachi, Chuo-ku, Kobe 650-0047, Japan