1. Department of Hematology, Oncology and Clinical Immunology, University Hospital Duesseldorf, 40225 Duesseldorf, Germany
2. Klinik für Onkologie, Hämatologie und Palliativmedizin, Marien Hospital Düsseldorf, Rochusstr. 2, 40479 Düsseldorf, Germany
3. National Center for Tumor Diseases Heidelberg (NCT), 69120 Heidelberg, Germany
4. Department of Internal Medicine V, University of Heidelberg, 69120 Heidelberg, Germany
5. Helios Klinikum Duisburg, 47166 Duisburg, Germany
6. Medizinische Klinik IV, University Hospital, 35392 Giessen, Germany
7. University Hospital Eppendorf, 20251 Hamburg, Germany
8. Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany