1. Institute of Pathology, Friedrich Alexander UniversityErlangen Germany
2. Institute for Surgical Pathology, University Medical Center Freiburg Germany
3. German Cancer Consortium (DKTK) and Cancer Research Center (DKFZ)Heidelberg Germany
4. Institute of Pathology, St. Vincentius HospitalKarlsruhe Germany
5. Institute of Pathology, Georg August UniversityGöttingen Germany
6. Department of Gastroenterology and EndocrinologyGeorg August UniversityGöttingen Germany
7. Department of General and Visceral SurgeryGeorg August UniversityGöttingen Germany
8. Division Molecular Genome AnalysisGerman Cancer Research Center (DKFZ)Heidelberg Germany