Netherlands Cancer Institute - Department of Thoracic Oncology, Shandong University - Department of Radiation Oncology, Netherlands Cancer Institute - Department of Thoracic Oncology, Cleveland Clinic - Department of Quantitative Health Sciences, University of Texas at Houston - Department of Biostatistics, Netherlands Cancer Institute, Erasmus University Rotterdam (EUR) - Cancer Institute, VU University Medical Center, VU University Medical Center, Allegheny Health Network - Allegheny General Hospital, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Diagnostic Radiology, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Thoracic/Head and Neck Medical Oncology, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Radiation Oncology, University of Texas at Houston - Department of Thoracic/Head and Neck Medical Oncology and University of Texas at Houston - Department of Radiation Oncology