<p><b>W. Dunbar Gram, DVM, DACVD, MRCVS,</b> is Service Chief and Clinical Associate Professor of Dermatology at the University of Florida College of Veterinary Medicine in Gainesville, Florida, USA.</p> <p><b>Rowan J. Milner, BVSc (Hons), MMedVet (Med), PhD, DECVIM-CA, DACVIM,</b> is Professor and Chair of the Department of Small Animal Clinical Sciences at the University of Florida College of Veterinary Medicine in Gainesville, Florida, USA.</p> <p><b>Remo Lobetti, BVSc (Hons), MMedVet (Med), PhD, DECVIM-CA,</b> is an internist at Bryanston Veterinary Hospital in Johannesburg, South Africa.</p>