1. Department of Obstetrics and Gynecology The Third Affiliated Hospital of Guangzhou Medical University, Key laboratory for Major Obstetric Diseases of Guangdong Province, and Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institute in Guangdong Province Guangzhou 510150 China
2. Department of Gynecology The First Affiliated Hospital of China Medical University Shenyang 110001 China
3. Department of Biochemistry and Molecular Biology College of Basic Medicine, China Medical University Shenyang 100013 China