1. Department of Radiation Oncology; Sun Yat-sen University Cancer Center; Guangzhou China
2. State Key Laboratory of Oncology in South China; Collaborative Innovation Center of Cancer Medicine; Guangzhou China
3. Guangzhou Institute of Respiratory Health, State Key Laboratory of Respiratory Disease; National Clinical Research Center for Respiratory Disease; Guangzhou China
4. Department of Respiratory Medicine; The First Affiliated Hospital of Guangzhou Medical University; Guangzhou China
5. Department of Radiation Oncology; The First Affiliated Hospital of Guangzhou Medical University; Guangzhou China
6. Department of Pathology; Sun Yat-sen University Cancer Center; Guangzhou China