1. School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 112, Taiwan
2. Taipei Municipal First Girls' Senior High School, Taipei 100, Taiwan
3. Department of Applied Mathematics, Chung-Yuan Christian University, Chungli 320, Taiwan
4. School of Chinese Medicine-Acupuncture Science, China Medical University, Taichung 404, Taiwan
5. Department of Nursing, Chang Gung Universityof Sciences and Technology, Taoyuan 333, Taiwan