1. Department of General Medical Oncology, University Hospitals Leuven, Leuven, Belgium;
2. Department of Radiology, University Hospitals Leuven, Leuven, Belgium;
3. Department of Pathology, University Hospitals Leuven, Leuven, Belgium;
4. Department of Biostatistics, KU Leuven, Leuven, Belgium;
5. Department of Urology, University Hospitals Leuven, Leuven, Belgium