1. Department of General, Visceral and Vascular Surgery, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
2. Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Hannover, Germany
3. Institute of Veterinary Anatomy, Freie Universität Berlin, Berlin, Germany
4. Department of Radiology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
5. Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany