1. Department of Clinical Sciences, National Veterinary School of Alfort; University of Paris-Est; 94700 Maisons-Alfort France
2. Department of Clinical Sciences; Veterinary Institute of Novara; 28060 Granozzo con Monticello (NO) Italy
3. Biological Sciences, National Veterinary School of Alfort; University of Paris-Est; 94700 Maisons-Alfort France