1. Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha, Hunan Province, People's Republic of China
2. Institute of Forensic Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, People's Republic of China
3. Sichuan University Law School, Sichuan University, Chengdu, People's Republic of China
4. Department of Obstetrics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, Hunan 410008, People's Republic of China