1. Radiation Oncology Department, 960 Hospital of the PLA Joint Logistics Support Force, Jinan, Shandong 250031, P.R. China
2. Oncology Department, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250013, P.R. China
3. Department of Nuclear Radiation Injury and Monitoring, The PLA Rocket Force Characteristic Medical Center, Beijing 100032, P.R. China
4. Pathology Department, Central Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250013, P.R. China