1. Department of Gastroenterology, Hepatology and Endocrinology; Hannover Medical School; Hannover Germany
2. Department of Cardiology, Angiology and Intensive Care; Klinikum Hildesheim; Hildesheim Germany
3. Department of Molecular and Clinical Cancer Medicine; University of Liverpool; Liverpool UK
4. Department for Biostatistics; Hannover Medical School; Hannover Germany
5. Department of Medical Oncology and Hematology; Charité-Universitätsmedizin Berlin; Berlin Germany
6. Department of Internal Medicine 1; University of Bonn; Bonn Germany
7. Department of Pathology; Hannover Medical School; Hannover Germany
8. Department of Visceral Surgery; Hannover Medical School; Hannover Germany
9. Department of Internal Medicine; University Medical Center of the Johannes Gutenberg University Mainz; Mainz Germany
10. Clinical Registry Unit; University Medical Center of the Johannes Gutenberg University Mainz; Mainz Germany