[1] Institute of Infection,Small Animal Teaching Hospital
[2] Veterinary and Ecological Sciences,Department of Veterinary Anatomy, Physiology and Pathology
[3] University of Liverpool,Diagnostic Imaging Section, Department of Clinical Sciences, Faculty of Veterinary Medicine
[4] Institute of Infection,Present address: Service d’imagerie médicale (ChuvAC), DEPEC
[5] Veterinary and Ecological Sciences,undefined
[6] University of Liverpool,undefined
[7] University of Liège,undefined
[8] École Nationale Vétérinaire d’Alfort,undefined