1. Department of Nursing, National Cheng Kung University and Hospital, Tainan, Taiwan.
2. Department of Public Health, National Cheng Kung University and Hospital, Tainan, Taiwan.
3. Department of Medicine, National Cheng Kung University and Hospital, Tainan, Taiwan.
4. Department of Obstetrics and Gynecology, College of Medicine, National Cheng Kung University and Hospital, Tainan, Taiwan.