Affiliation: | 1. Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA;2. Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, Raleigh, NC, USA;3. Comparative Medicine Institute, North Carolina State University, Raleigh, NC, USA;4. Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA |