1. Centre Hospitalier Vétérinaire des Cordeliers; 29 Avenue Joffre 77100 Meaux France
2. Laboratoire Idexx Alfort; 17 Allée Jean Baptiste Preux 94140 Alfortville France
3. Clinique vétérinaire Advetia; 5 Rue Dubrunfaut 75012 Paris France
4. Department of Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Colorado State University; Fort Collins CO 80523-1601 USA