1. Department of Medicine V, University of Heidelberg, Heidelberg, Germany;
2. Department of Medicine III, University of Ulm, Ulm, Germany;
3. Department of Medicine II, University of Schleswig-Holstein, Kiel, Germany;
4. Department of Medicine III, University Medical Center Rostock, Rostock, Germany;
5. Department of Hematology, Oncology, and Stem Cell Transplantation, Asklepios Hospital St. Georg, Hamburg, Germany;
6. Department of Hematology, Hemostasis, Oncology, and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany;
7. Department of Internal Medicine I, Saarland University Medical School, Homburg, Germany;
8. Division of Hematology, Oncology, and Tumor Immunology, Charité University Medicine Berlin, Berlin, Germany; and
9. Department of Medicine I, University of Cologne, Cologne, Germany