1. Department of Obstetrics and Gynecology; Nanfang Hospital, Southern Medical University; Guangzhou Guangdong Province People's Republic of China
2. Department of Obstetrics and Gynecology; The First Affiliated Hospital of Guangzhou Medical University; Guangzhou Guangdong Province People's Republic of China
3. Department of Immunology, School of Basic Medical Sciences; Southern Medical University, Guangdong Provincial Key Laboratory of Proteomic; Guangzhou Guangdong Province People's Republic of China
4. Department of Pathology; Nanfang Hospital, Southern Medical University; Guangzhou Guangdong Province People's Republic of China