1. Institute of Population Health Sciences; National Health Research Institutes; Miaoli Taiwan
2. Department of Health Risk Management, College of Management; China Medical University; Taichung Taiwan
3. Graduate Institute of Clinical Medicine, School of Medicine, College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
4. Department of Obstetrics & Gynecology; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
5. Graduate Institute of Medicine, School of Medicine, College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
6. Department of Public Health; College of Public Health Science, Kaohsiung Medical University; Kaohsiung Taiwan