1. Department of Obstetrics and Gynecology, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, 26 Heping Road, Harbin, China
2. Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong
3. Department of Obstetrics and Gynecology, Hubei Province Hospital of Chinese Medicine, Wuhan, China
4. Department of Gynecology, Hangzhou City Hospital of Chinese Medicine, Hangzhou, China
5. Department of Gynecology, Department of Traditional Technology, Guangdong Province Hospital of Chinese Medicine, Guangzhou, China
6. Department of Gynecology, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
7. Department of Obstetrics and Gynecology, First Affiliated Hospital, Liaoning University of Chinese Medicine, Shenyang, China
8. Department of Obstetrics and Gynecology, First Affiliated Hospital, Hunan University of Chinese Medicine, Changsha, China
9. Department of Obstetrics and Gynecology, Affiliated Hospital, Anhui University of Chinese Medicine, Hefei, China
10. Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
11. Department of Obstetrics and Gynecology, Pennsylvania State University, Hershey, USA
12. Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong
13. Department of Biostatistics, Yale University School of Public Health, New Haven, CT, USA
14. Department of Obstetrics and Gynaecology, Monash University, Monash Medical Centre, 246 Clayton Road, Clayton, Victoria 3168, Australia
15. Reproduction and Development Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong
16. School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong