1. Division of Episomal‐Persistent DNA in Cancer and Chronic Diseases German Cancer Research Centre Heidelberg Germany
2. Electron Microscopy Core Facility German Cancer Research Centre Heidelberg Germany
3. Division of Virus‐Associated Carcinogenesis German Cancer Research Centre Heidelberg Germany
4. Department of Surgery, University Hospital Mannheim, Medical Faculty Mannheim University of Heidelberg Mannheim Germany
5. Division of Chronic Inflammation and Cancer German Cancer Research Centre Heidelberg Germany
6. Tissue Bank of the National Centre for Tumour Diseases (NCT) Heidelberg Germany
7. Institute of Pathology University Hospital Heidelberg Germany
8. Department of General, Visceral and Transplantation Surgery University of Heidelberg Germany