Wen-Ling Lee1,2, Peng-Hui Wang3,4,5,6. 1. Department of Medicine, Cheng-Hsin General Hospital, Taipei, Taiwan, ROC. 2. Department of Nursing, Oriental Institute of Technology, New Taipei City, Taiwan, ROC. 3. Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC. 4. Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC. 5. Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan, ROC. 6. Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, ROC.