1. Department of Forensic Medicine; Zhongshan School of Medicine; Sun Yat-sen University
2. Reproductive Medicine Center; First Affiliated Hospital of Sun Yat-sen University
3. Fetal Medicine Center; Department of Obstetrics and Gynecology; First Affiliated Hospital of Sun Yat-sen University
4. Department of Forensic Medicine; Zhongshan School of Medicine; Sun Yat-sen University; Guangzhou; China