Institution: | 1. Department of Clinical Studies – Philadelphia, School of Veterinary Medicine, University of Pennsylvania, , Philadelphia, PA, 19104 USA;2. Department of Pathobiology – Philadelphia, School of Veterinary Medicine, University of Pennsylvania, , Philadelphia, PA, 19104 USA;3. Red Bank Veterinary Hospital, , Tinton Falls, NJ, 07724 USA;4. Department of Clinical Studies – New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, , Kennett Square, PA, 19348 USA |