1. Department of Diagnostic and Interventional Radiology; University of Heidelberg; Heidelberg Germany
2. Department of Radiology; German Cancer Research Center (dkfz); Heidelberg Germany
3. Department of Internal Medicine V; University of Heidelberg; Heidelberg Germany
4. Department of Biostatistics; German Cancer Research Center (dkfz); Heidelberg Germany
5. Multiple Myeloma Section; National Cancer Institute, Nationl Institutes of Health; Bethesda MD