1. Department of Forensic Medicine; Nanjing Medical University; Nanjing Jiangsu 210029 China
2. Office of the Chief Medical Examiner; State of Maryland; 900 West Baltimore Street Baltimore MD 21223 U.S.A
3. Sino-US Forensic Science Research Center; Collaborative Innovation Center of Judicial Civilization; China University of Political Science and Law; Beijing 100088 China