1. Department of General, Visceral and Thoracic Surgery; Dresden-Friedrichstadt General Hospital; Dresden Germany
2. Institute of Anatomy; Center of Clinical Anatomy; Christian-Albrechts University Kiel; Kiel Germany
3. Department of General, Visceral and Transplant Surgery; University Medical Center of the Johannes Gutenberg-University Mainz; Mainz Germany
4. Pathology and Tumour Biology; Leeds Institute of Cancer and Pathology; University of Leeds; Leeds UK