Li-Li Chen1, Meei-Ling Gau2, Chien-Huei Kao3, Wan-Lin Pan4. 1. PhD student, Department of Nursing, National Taipei University of Nursing and Health Sciences, 365, Ming-Te Road, Peitou, Taipei, Taiwan. Electronic address: 081117010@ntunhs.edu.tw. 2. Professor, Graduate Institute of Nurse-Midwifery, National Taipei University of Nursing and Health Sciences, 365, Ming-Te Road, Peitou, Taipei, Taiwan. Electronic address: meeiling@ntunhs.edu.tw. 3. Associate Professor, Department of Nurse-Midwifery and Women Health, National Taipei University of Nursing and Health Sciences, 365, Ming-Te Road, Peitou, Taipei, Taiwan. Electronic address: chenhuei@ntunhs.edu.tw. 4. Assistant Professor, Department of Nursing, National Taipei University of Nursing and Health Sciences, 365, Ming-Te Road, Peitou, Taipei, Taiwan. Electronic address: wanlimp@ntunhs.edu.tw.