1. Department of Gynecology and Obstetrics Tianjin Medical University General Hospital Tianjin People's Republic of China
2. Tianjin Key Laboratory of Female Reproductive Health and Eugenics Tianjin Medical University General Hospital Tianjin People's Republic of China
3. Department of Pathology First Teaching Hospital of Tianjin University of Traditional Chinese Medicine Tianjin People's Republic of China
4. National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion Tianjin People's Republic of China