1. School of Nursing, Faculty of Medicine, University of Miyazaki, Miyazaki 889-1692, Japan.
2. Faculty of Nursing, University of Kochi, Kochi 781-8515, Japan.
3. Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-0942, Japan.
4. Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa 920-0942, Japan.