Robert M. Kirberger BVSc DVSc MMedVet(Rad) DipECVDI
Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort 0110, South Africa
Fintan J. McEvoy MVB PhD DVSc DVR DipECVDI
Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Dyrlægevej 16, 1870, Frederiksberg C, Denmark