1. Department of Obstetrics, Gynecology & Women’s Health, Taichung Veterans General Hospital, Taichung 407219, Taiwan
2. Department of Anesthesiology, Taichung Veterans General Hospital, Taichung 407219, Taiwan
3. Department of Medicine, National Yang-Ming-Chiao-Tung University School of Medicine, Taipei 112304, Taiwan
4. Department of Post-Baccalaureate Medicine, National Chung-Hsin University, Taichung 402227, Taiwan
5. Wuri Lin Shin Hospital, Taichung 414013, Taiwan
6. Show Chwan Memorial Hospital, Changhua 505029, Taiwan