1. Department of Radiotherapy and Oncology, University of Frankfurt, Frankfurt, Germany
2. German Cancer Research Center (DKFZ), Heidelberg, Germany
3. German Cancer Consortium (DKTK), partner site: Frankfurt/Mainz, Heidelberg, Germany
4. Institute of Pathology, University Medical Center Göttingen, Göttingen, Germany
5. Department of Radiation Therapy, University of Erlangen-Nürnberg, Nürnberg, Germany
6. Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Göttingen, Germany
7. Department of Radiation Oncology and Radiotherapy, DiaCura and Klinikum Coburg, Coburg, Germany
8. Institute of Pathology
9. Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
10. Department of Hematology/Oncology and Gastroenterology, Kliniken Maria Hilf GmbH Mönchengladbach, Mönchengladbach, Germany
11. Department of Radiation Oncology, Kliniken Maria Hilf GmbH Mönchengladbach, Mönchengladbach, Germany
12. Department of General and Visceral Surgery, University of Oldenburg, Oldenburg, Germany
13. Institute of Pathology, University of Leipzig, Leipzig, Germany