1. Department of Hematology, Oncology and Immunology, University Hospital Giessen and Marburg, Marburg, Germany;
2. Interdisciplinary Cancer Center, Klinikum Fulda, Fulda, Germany;
3. Department of Hematology, Oncology and Palliative Care, St. Marien Krankenhaus Siegen, Siegen, Germany;
4. Department of Hematology, Oncology and Immunology, University Hospital Giessen and Marburg, Gießen, Germany