1. Section of Radiology, Department of Veterinary Clinical Sciences, University of Bern, Länggasse 124, 3001 Bern, Switzerland
2. M. E. Müller Center of Evaluative Research in Orthopedic Surgery, Murtenstrasse 35, PO Box 8354, 3008 Bern, Switzerland
3. Tierärztliches Überweisungszentrum, Hauptstrasse 21, 4456 Tennikon, Switzerland