1. Institute for Transfusion Medicine and Immunohematology, Johann-Wolfgang-Goethe University and German Red Cross Blood Service, Frankfurt am Main, Germany
2. Georg-Speyer-Haus, Institute for Tumorbiology and experimental Therapy, Frankfurt, Germany
3. Department of Internal Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, Heidelberg, Germany