1. Department of Gynecology and Obstetrics, Jinan University First Affiliated Hospital, Guangzhou, Guangdong 510632, P.R. China
2. Department of Pathology, Longgang District People's Hospital, Shenzhen, Guangdong 518172, P.R. China
3. Department of Pathology, Longgang District People's Hospital, Shenzhen, Guangdong 518172, P.R. China
4. Department of Pathology, Jinan University School of Medicine, Guangzhou, Guangdong 510632, P.R. China
5. Department of Gynecology and Obstetrics, Jinan University First Affiliated Hospital, Guangzhou, Guangdong 510632, P.R. China
6. Department of Pathology, Jinan University School of Medicine, Guangzhou, Guangdong 510632, P.R. China