1. Department of Respiratory & Critical Care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
2. Department of Thoracic Oncology II, Key Laboratory of Carcinogenesis & Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital & Institute, Beijing, China
3. Department of Oncology, Renji Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
4. Department of Radiation Oncology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China