1 Department of Medicine, Cheng-Hsin General Hospital, Taipei, Taiwan, ROC; Department of Nursing, Oriental Institute of Technology, New Taipei City, Taiwan, ROC; Department of Nursing, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC.
2 Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University Hospital, Ilan, Taiwan, ROC.
3 Department of Nursing, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Obstetrics and Gynecology, National Yang-Ming University, Taipei, Taiwan, ROC; Division of Gynecology, Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Immunology Center, Taipei Veterans General Hospital, Taipei, Taiwan, ROC; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, ROC. Electronic address: phwang@vghtpe.gov.tw.