1. Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan
2. Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
3. School of Medicine, Chung Shan Medical University, Taichung, Taiwan
4. Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan
5. Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taiwan
6. Department of Medical Research, Chung Shan Medical University Hospital, Taiwan
7. College of Nursing, Chung Shan Medical University, Taichung, Taiwan
8. Department of Nursing, Chung Shan Medical University Hospital, Taichung, Taiwan
9. Institute of Nursing, Chung Shan Medical University, Taichung, Taiwan