1. The First Clinical College of Jinan University, Guangzhou, Guangdong, P.R. China
2. Department of Gynecology, Guangdong Women and Children Hospital, Guangzhou, P. R. China
3. The Second Clinical College, Guangzhou University of Chinese Medicine, Guangdong, P.R. China
4. Department of Gynecology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, P.R. China