Feng Song1, Hai-bo Luo1, Yi-ping Hou2. 1. Department of Forensic Genetics, West China School of Basic Science and Forensic Medicine, Sichuan University (West China University of Medical Sciences), Chengdu 610041, Sichuan, China. 2. Department of Forensic Genetics, West China School of Basic Science and Forensic Medicine, Sichuan University (West China University of Medical Sciences), Chengdu 610041, Sichuan, China. Electronic address: prof.hou@gmail.com.