1. University Clinic for Radiology and Nuclear Medicine, University Hospital Magdeburg, D‑39120 Magdeburg, Germany
2. Department of Hematology and Oncology, University Hospital Magdeburg, D‑39120 Magdeburg, Germany
3. Institute of Medical Epidemiology, Biometry and Informatics, Martin‑Luther‑University, D‑06112 Halle‑Wittenberg, Germany