1. Department of Molecular Pathology; Institute of Pathology, Julius Maximilians University of Wuerzburg; Wuerzburg Germany
2. Comprehensive Cancer Center Mainfranken; Julius Maximilians University of Wuerzburg; Wuerzburg Germany
3. Institute of Neuropathology; University Clinic Freiburg; Freiburg Germany
4. School of Cancer Sciences, Institute of Biomedical Research, College of Medical and Dental Sciences; University of Birmingham; Birmingham UK
5. Institute of Molecular Medicine; University Medical Center of the Johannes Gutenberg University of Mainz; Mainz Germany
6. German Cancer Research Center; Heidelberg Germany
7. Clinic of Gastroenterology and Gastrointestinal Oncology; University of Goettingen; Goettingen Germany