1. University of Heidelberg, Department of Internal Medicine V, Heidelberg, Germany
2. University of Heidelberg, Department of Diagnostic and Interventional Radiology, Heidelberg, Germany
3. University of Heidelberg, Department of Orthopedics and Trauma Surgery, Heidelberg, Germany
4. German Cancer Research Centre, Department of Biostatistics, Heidelberg, Germany
5. German Cancer Research Centre, Department of Radiology, Heidelberg, Germany