1. Department of Clinical Sciences, Faculty of Veterinary MedicineUniversity of LiègeQuartier Vallée 2, Avenue de Cureghem 3, 4000LiègeBelgium
2. Department of Biostatistics, Faculty of Veterinary MedicineUniversity of LiègeQuartier Vallée 2, Avenue de Cureghem 3, 4000LiègeBelgium