1. Department of Radiation Oncology, Heidelberg University Hospital, 69120 Heidelberg, Germany
2. Heidelberg Institute of Radiation Oncology (HIRO), 69120 Heidelberg, Germany
3. National Center for Tumor Diseases (NCT), 69120 Heidelberg, Germany
4. Clinical Cooperation Unit Radiation Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
5. Division of Molecular and Translational Radiation Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
6. Clinical Cooperation Unit Molecular Radiation Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
7. Institute of Medical Biometry, University of Heidelberg, 69120 Heidelberg, Germany
8. Department of Radiology, Heidelberg University Hospital, 69120 Heidelberg, Germany
9. Department of Radiology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
10. Division of Medical Physics in Radiation Oncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
11. Heidelberg Ion-Beam Therapy Center (HIT), Department of Radiation Oncology, Heidelberg University Hospital, 69120 Heidelberg, Germany
12. German Cancer Consortium (DKTK), Partner Site, 69120 Heidelberg, Germany