1 Department of Nursing, Taipei Veterans General Hospital, Taipei 112, Taiwan; Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan.
2 Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan; School of Public Health, National Defense Medical Center, Taipei 114, Taiwan.
3 Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung, Taiwan; Female Cancer Foundation, Taipei, Taiwan. Electronic address: phwang@vghtpe.gov.tw.