1. Department of Oncology, Experimental Radiation Oncology, KU Leuven–University of Leuven, Leuven, Belgium;
2. Respiratory Diseases/Respiratory Oncology Unit, KU Leuven–University of Leuven, University Hospitals Leuven, Leuven, Belgium;
3. Department Imaging and Pathology, Nuclear Medicine and Molecular Imaging, KU Leuven–University of Leuven, University Hospitals Leuven, Leuven, Belgium;
4. Radiology Department, University Hospitals Leuven, Leuven, Belgium;
5. Department of Thoracic Surgery, University Hospitals Leuven, Leuven, Belgium;
6. Department of Radiation Oncology, KU Leuven–University of Leuven, University Hospitals Leuven, Leuven, Belgium;
7. Department of Oncology, Radiation Oncology, University of Turin, Turin, Italy;
8. GROW–School for Oncology and Developmental Biology, Department of Radiation Oncology (MAASTRO clinic), Maastricht University Medical Center, Maastricht, The Netherlands