1 Department of Hematology, Hemostasis, Oncology, and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany. beutel.gernot@mh-hannover.de.
2 Department of Hematology, Hemostasis, Oncology, and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany.
3 Medical Clinic V. Nephrology | Rheumatology | Blood Purification, Academic Teaching Hospital Braunschweig, Brunswick, Germany.