1. Department of Obstetrics and Gynecology; Changhua Christian Hospital; Changhua Taiwan
2. Department of Family Medicine; Puli Christian Hospital; Puli Taiwan
3. Department of Medical Education and Research; Puli Christian Hospital; Puli Taiwan
4. National Chi Nan University; Puli Taiwan
5. Central Taiwan University of Science and Technology; Taichung Taiwan
6. National Taichung University of Science and Technology; Taichung Taiwan. Chaoyang University of Technology; Taichung Taiwan. National Chin-Yi University of Technology; Taichung Taiwan. Feng Chia University; Taichung Taiwan