1. Clinic of Hematology and Oncology, Carl-Thiem-Klinikum, Cottbus, Germany
2. Department of Hematology, Medical Oncology & Pneumology, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
3. Clinic of Hematology, Oncology and Palliative Care, Klinikum Ernst von Bergmann, Potsdam, Germany
4. Department of Hematology and Oncology, Medical Center, Otto-von-Guericke University, Magdeburg, Germany