1. Department of Radiation Oncology, UZ Leuven, Leuven, Belgium
2. Department of Oncology, KU Leuven, Leuven, Belgium
3. Department of Thoracic Surgery, UZ Leuven, Leuven, Belgium
4. Department of Chronic Diseases and Metabolism (CHROMETA), KU Leuven, Leuven, Belgium