1. Clinic of Small Animal Medicine
2. Department of General Pathology and Neuropathology; Faculty of Veterinary Medicine; Ludwig Maximilian University Munich; Veterinaerstrasse 13 80539 Munich Germany
3. Centre of Preclinical Research; Ismaningerstrasse 22 81675 Munich Germany
4. Institute for Statistics; Ludwig Maximilian University Munich; Ludwigstrasse 33 80539 Munich Germany