1. Department of Obstetrics and Gynaecology; Hualien Tzu Chi Hospital; Tzu Chi Medical Foundation; Tzu Chi University; Hualien Taiwan
2. Institute of Medical Sciences; Tzu Chi University; Hualien Taiwan
3. Management Office for Health Data; China Medical University Hospital; Taichung Taiwan
4. College of Medicine; China Medical University; Taichung Taiwan
5. Graduate Institute of Clinical Medical Science; China Medical University; Taichung Taiwan
6. Department of Research; Hualien Tzu Chi Hospital; Tzu Chi Medical Foundation; Tzu Chi University; Hualien Taiwan
7. Department of Neurosurgery; Hualien Tzu Chi Hospital; Tzu Chi Medical Foundation; Tzu Chi University; Hualien Taiwan
8. Department of Health Services Administration; China Medical University; Taichung Taiwan