1. Clinical Medical College, Weifang Medical University, Weifang, China
2. Linyi People’s Hospital, Linyi, China
3. Clinical Medical College, Qingdao University, Qingdao, China
4. Department of Radiotherapy, Affiliated Qingdao Centre Hospital, Qingdao University, Qingdao, China
5. Hebei Medical University, Shijiazhuang, China
6. Department of Radiotherapy & Oncology, The Affiliated Suzhou Hospital of Nanjing Medical University, Gusu School, Nanjing Medical University, Suzhou, China