1. Department of Surgery; University Erlangen; Erlangen Germany
2. Department of Experimental Surgery and Molecular Oncology of Solid Tumors; Medical Faculty Mannheim; University Heidelberg and DKFZ Heidelberg; Heidelberg Germany
3. Cancer Registry; Department of Surgery; University Erlangen; Erlangen Germany
4. Institute of Pathology; University Erlangen; Erlangen Germany
5. Department of Pathology; St. Vincentius Hospital; Karlsruhe Germany
6. Department of Pathology; Klinikum Nord; Nürnberg Germany