1. Department of Medical Genetics, Nanjing University School of Medicine, Nanjing, China.
2. Department of Pathology, Nanjing University School of Medicine, Nanjing, China.
3. Jiangsu Key Laboratory for Molecular Medicine, Nanjing University School of Medicine, Nanjing, China.
4. Department of Obstetrics and Gynecology, the Affiliated Drum Tower Hospital of Nanjing University School of Medicine, Nanjing, China.
5. Jiangsu Provincial Center for Disease Prevention and Control, Nanjing, China.