1. Department of Veterinary Clinical Sciences; Clinic for Small Animals; Justus-Liebig University; Giessen Germany
2. Department of Diagnostic and Interventional Radiology; University Hospital Gießen; Gießen Germany
3. Vetsuisse Faculty Berne; Clinical Radiology; Berne Switzerland
4. Department of Companion Animals and Horses; University of Veterinary Medicine; Vienna Austria
5. Section of Neurology; Clinic of Small Animal Medicine; Ludwig-Maximilians-University; Munich Germany
6. Clinic of Small Animal Surgery and Reproduction; Ludwig Maximilians-University; Munich Germany
7. Unit for Biomathematics and Data Processing; Faculty of Veterinary Medicine; Justus Liebig-University; Giessen Germany