Yan Lu1, Peng Song2, Jian-Chun Huang2, Xu Wu3. 1. School of Forensic Medicine, China Medical University, No.77, Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, China; Key Laboratory of Health Ministry in Congenital Malformation, The Affiliated Shengjing Hospital of China Medical University, No. 36, Sanhao Road, Heping District, Shenyang, Liaoning, 110004, China. 2. Division of Forensic Science, Fujian Provincial Public Security Department, No.12,Hualin Road, Gulou District, Fuzhou, Fujian, 350003, China. 3. School of Forensic Medicine, China Medical University, No. 77, Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, China. Electronic address: xwu@cmu.edu.cn.