1. Division of Hematology and Oncology, University Hospital Leipzig, Leipzig, Germany
2. Division of Dermatology and Venereology, University Hospital Halle, Halle, Germany
3. Division of Hematology and Oncology, University Hospital Heidelberg, Heidelberg, Germany
4. Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany
5. Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany