1. Department of Nursing, National Tainan Junior College of Nursing, Tainan City, Taiwan
2. Institute of Gerontology, College of Medicine, National Cheng Kung University, Tainan City, Taiwan
3. School of Nursing, College of Nursing, Kaohsiung Medical University, Kaohsiung, Taiwan
4. Department of Health Care Management, National Taipei University of Nursing and Health Sciences, Taipei City, Taiwan