1. Department of Gynecology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Guangxi Zhuang Autonomous Region, Nanning City, China;
2. Department of Gynecology, Liuzhou Worker’s Hospital, Guangxi Zhuang Autonomous Region, Liuzhou City, China;
3. Department of Gynecology, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou City, China