1. Institute of Medicine; Chung Shan Medical University; Taichung Taiwan
2. Department of Anesthesiology; Chung Shan Medical University and Hospital; Taichung Taiwan
3. Department of Public Health and Institute of Public Health; Chung Shan Medical University; Taichung Taiwan
4. Department of Family and Community Medicine; Chung Shan Medical University Hospial; Taichung Taiwan
5. Department of Public Health; Chung Shan Medical University; Taichung Taiwan
6. EBM Center & Library; Chung Shan Medical University Hospital; Taichung Taiwan
7. College of Medicine; Chung Shan Medical University; Taichung Taiwan
8. Department of Obstetrics and Gynecology; Chung Shan Medical University Hospital; Taichung Taiwan