1. Department of Gastrointestinal; Thoracic and Vascular Surgery, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden; Dresden Germany
2. NCT Tissue Bank of the National Center of Tumor Diseases (NCT) Heidelberg and Institute of Pathology, INF 224, University Hospital Heidelberg; Heidelberg Germany
3. Division of Clinical Epidemiology and Aging Research; German Cancer Research Center; Heidelberg Germany
4. Unit of Genetic Epidemiology; Division of Cancer Epidemiology; German Cancer Research Center; Heidelberg Germany
5. Institute of Pathology, Charité - Universitätsmedizin Berlin Campus Mitte Charitéplatz 1; Berlin Germany
6. Institute of Pathology, Medizinische Fakultät Carl Gustav Carus, Technische Universität; Dresden Germany