1. Department of Population Health and Pathobiology; North Carolina State University College of Veterinary Medicine; 1052 William Moore Drive Raleigh NC 27607 USA
2. Comparative Medicine Institute; North Carolina State University College of Veterinary Medicine; 1060 William Moore Drive Raleigh NC 27607 USA
3. Department of Clinical Sciences; North Carolina State University College of Veterinary Medicine; 1052 William Moore Drive Raleigh NC 27607 USA
4. Department of Pathology; Georgetown University Medical Center; 37th Street Washington DC 20057 USA
5. Department of Large Animal Clinical Sciences; College of Veterinary Medicine; University of Florida; 2015 SW 16th Avenue Gainesville FL 32610 USA