Peng-Hui Wang1, Ming-Jie Yang2, Chih-Yao Chen3, Hsiang-Tai Chao3. 1. Division of Gynecology, Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, ROC; Immunology Center, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Infection and Immunity Research Center, National Yang-Ming University, Taipei, Taiwan, ROC. Electronic address: phwang@vghtpe.gov.tw. 2. Division of Gynecology, Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC. 3. Division of Gynecology, Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan, ROC.