1. School of Medicine Shandong University Jinan China
2. Department of Radiation Oncology Liaocheng People’s Hospital Liaocheng China
3. Department of Radiation Oncology Shandong Cancer Hospital and Institute Jinan China
4. Department of Health Care Liaocheng People’s Hospital Liaocheng China
5. Shandong First Medical University and Shandong Academy of Medical Sciences Jinan China