1 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 Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC.