1. Department of Obstetrics and Gynecology; West China Second Hospital, Sichuan University; Chengdu China
2. Laboratory of Molecular Translational Medicine, West China Institute of Women and Children's Health; West China Second University Hospital, Sichuan University; Chengdu China
3. Department of Forensic Biology, West China School of Preclinical and Forensic Medicine; Sichuan University; Chengdu China