1. Department of Radiology, University Hospitals Leuven, Herestraat 49, B-3000 Leuven, Belgium
2. Department of Imaging and Pathology, KU Leuven, Leuven, Belgium
3. Department of Thoracic Surgery, University Hospitals Leuven, Leuven, Belgium
4. Department of Chronic Diseases, Metabolism and Ageing, KU Leuven, Leuven, Belgium