1. Clinic for Swine and Small Ruminants; Forensic Medicine and Ambulatory Services; University of Veterinary Medicine Hannover; Bischofsholer Damm 15 D-30173 Hannover Germany
2. Institute for General Radiology and Medical Physics; University of Veterinary Medicine Hannover; Bischofsholer Damm 15 D-30173 Hannover Germany
3. Institute of Anatomy; University of Veterinary Medicine Hannover; Bischofsholer Damm 15 D-30173 Hannover Germany
4. Clinic for Swine; University of Veterinary Medicine Vienna; Veterinärplatz 1 1210 Vienna Austria