1. Department of Radiation Oncology, Charité Universitätsmedizin Berlin, Berlin, Germany
2. Kantonsspital Aarau, Centre for Radiation Oncology KSA-KSB, Aarau, Switzerland
3. Doctoral Clinical Science Program, University of Zürich, Zürich, Switzerland
4. Department of Radiation Oncology, University Hospital Ludwig Maximilians Universität, München, Germany
5. Department of Radiation Oncology, Eberhard Karls University Tuebingen, Tübingen, Germany
6. Department of Radiation Oncology, Medical University of Vienna/AKH, Vienna, Austria
7. Department of Hematology, Oncology and Tumor Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany
8. Charité – Universitätsmedizin Berlin, Berlin, Germany; German Cancer Consortium (DKTK), partner site Berlin, and German Cancer Research Center (DKFZ), Heidelberg, Germany
9. Department of Medical Oncology, University Hospital Ludwig Maximilians Universität, München, Germany
10. Department of Radiation Oncology, Universitätsklinikum Erlangen, Erlangen, Germany
11. Department of Medical Oncology, Helios Klinikum Bad Saarow, Bad Saarow, Germany
12. Clinic for Internal Medicine C - Haematology and Oncology, Stem Cell Transplantation and Palliative Care, University Medicine Greifswald, Greifswald, Germany
13. Department of Medical Oncology, Helios Hospital Berlin-Buch, Berlin, Germany
14. Berlin Institute of Health at Charité – Universitätsmedizin Berlin, Berlin, Germany
15. Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland