1. Department of Radiation Oncology, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, China
2. Department of Radiation Oncology, Zhejiang Cancer Hospital, Hangzhou, China
3. Department of thoracic surgery, Fourth Hospital of Hebei Medical University & Hebei Cancer Hospital, Shijiazhuang, China
4. Department of Radiation Oncology, Fourth Hospital of Hebei Medical University & Hebei Cancer Hospital, Shijiazhuang, China
5. Department of Radiation Oncology, Hebei University Affiliated hospital, Baoding, China
6. Department of CT/MRI, Fourth Hospital of Hebei Medical University & Hebei Cancer Hospital, Shijiazhuang, China