1. Department of Hematology, Oncology and Stem Cell Transplantation, Asklepios Hospital St Georg, Hamburg, Germany;
2. Department of Hematology and Oncology, University of Göttingen, Göttingen, Germany;
3. Institute of Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany;
4. Department of Internal Medicine V, University of Heidelberg, Heidelberg, Germany;
5. Department of Hematology and Oncology, Klinikum Oldenburg, Oldenburg, Germany;
6. Department of Hematology and Oncology, Carl-Thiem Klinikum, Cottbus, Germany;
7. Institute of Pathology, University of Würzburg, Würzburg, Germany; and
8. Department of Internal Medicine I, Saarland University, Homburg/Saar, Germany