1. Institute of Pathology, Technical University Munich Munich Germany
2. Internal Medicine, Department of GastroenterologyUniversity Hospital Heidelberg Heidelberg Germany
3. Division of Translational Medical OncologyNational Center for Tumor Diseases (NCT) Heidelberg and DKFZ Heidelberg Germany
4. DKFZ‐Heidelberg Center for Personalized Oncology (HIPO) Heidelberg Germany
5. German Cancer Consortium (DKTK) Heidelberg Germany
6. Institute of Pathology Heidelberg Germany