Affiliation: | 1. Department of Clinical Studies—New Bolton Center, The University of Pennsylvania School of Veterinary Medicine, Kennett Square, Pennsylvania, USA;2. Department of Veterinary Science, Gluck Equine Research Center, The University of Kentucky College of Agriculture, Food and Environment, Lexington, Kentucky, USA;3. Department of Clinical Sciences, Lincoln Memorial University College of Veterinary Medicine, Harrogate, Tennessee, USA |