Jun Yao1, Ke-Yang Xiong2, Yong Zhang3. 1. School of Forensic Medicine, China Medical University, No. 77, Puhe Road, Shenbei New District, Shenyang, Liaoning, 110122, China. 2. Fifth Battalion, Interpol detachment, Public Security Bureau of Yangjiang City, No. 99, Dongfeng San Road, Jiangcheng District, Yangjiang, Guangdong, 529500, China. 3. Cancer Hospital of China Medical University, Liaoning Cancer Hospital & Institute, No. 44, Xiaoheyan Road, Dadong District, Shenyang, Liaoning, 110042, China. Electronic address: zhangyong@cancerhosp-ln-cmu.com.