1. Institute of Pathology, Technical University of Munich, Munich, Germany
2. German Cancer Consortium, Partner Site Munich, Munich, Germany
3. Molecular Pathology South-Bavaria, Munich, Germany
4. Institute of Pathology, University of Heidelberg, Heidelberg, Germany
5. RoMED Surgical Clinic, Rosenheim, Germany
6. Department of Surgery, Technical University of Munich, Munich, Germany
7. Institute of Pathology, University of Bern, Bern, Switzerland