1. Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
2. Division of Biostatistics, German Cancer Research Center (DKFZ), Heidelberg, Germany
3. Medical Faculty, University of Heidelberg, Heidelberg, Germany
4. Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany
5. Department of Medicine V, Multiple Myeloma Section, University Hospital Heidelberg, Heidelberg, Germany
6. National Center for Tumor Diseases (NCT), University Hospital Heidelberg, Heidelberg, Germany