1. Bristol Veterinary School, University of Bristol, Langford House, Langford, Bristol BS40 5DU UK
2. Dina-Weißmann-Allee 6, 68519 Viernheim, Germany
3. University of Buenos Aires (UBA), Chorroarín 280 C1427CWO, Autonomous City of Buenos Aires, Argentina
4. The Ohio State University College of Veterinary Medicine, Columbus, OH 43210 USA