1. Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, PR China;
2. Department of The Medical Record, Guangdong Women and Children Hospital, Guangzhou, PR China;
3. Translational Medicine Center, Guangdong Women and Children Hospital, Guangzhou, PR China;
4. Department of Ultrasound, Guangdong Women and Children Hospital, Guangzhou, PR China;
5. Department of Obstetrics, Guangdong Women and Children Hospital, Guangzhou, PR China;
6. Guangdong Women and Children Hospital, Guangzhou, PR China