1. Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China.
2. Department of Immunology, College of Preclinical and Forensic Medicine, Sichuan University, Chengdu, China.
3. Insitute of Forensic Science, Chongqing Public Security Bureau, Chongqing, China.
4. The Reproductive Centre, Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, China.