1 Division of Physics, Chongqing Cancer Institute, Chongqing, People's Republic of China; Department of Radiation Oncology, Chongqing Cancer Institute, Chongqing, People's Republic of China.
2 Forensic Identification Center, College of Criminal Investigation, Southwest University of Political Science and Law, Chongqing, People's Republic of China.
3 Division of Physics, Chongqing Cancer Institute, Chongqing, People's Republic of China.
4 Department of Radiation Oncology, Chongqing Cancer Institute, Chongqing, People's Republic of China.