1. Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, PR China
2. Department of Radiology, State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer Center, Sun Yat-Sen University, Guangzhou, PR China
3. Division of General Thoracic Surgery, Bern University Hospital, University of Bern, Bern, Switzerland
4. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
5. Division of Pulmonary Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA