1. Department of Obstetrics and Gynecology; Qilu Hospital, Shandong University; Jinan Shandong P.R. China
2. Department of Pathology; Northwestern University Feinberg School of Medicine; Chicago Illinois
3. Department of Pathology; Qilu Hospital, Shandong University; Jinan Shandong P.R. China
4. Institute of Genetics; Shandong University; China.
5. Department of Obstetrics and Gynecology-Division of Reproductive Science in Medicine; Northwestern University Feinberg School of Medicine; Chicago Illinois
6. Robert H. Lurie Comprehensive Cancer Center; Northwestern University Feinberg School of Medicine; Chicago Illinois