1. North Carolina State University, College of Veterinary Medicine, 4700 Hillsborough Street, Raleigh, North Carolina 27606, USA1
2. University of Illinois, College of Veterinary Medicine, Wildlife Medical Clinic, 1008 W. Hazelwood Dr., Urbana, Illinois 61802, USA1
3. University of Illinois, College of Veterinary Medicine, Department of Pathobiology, 2001 S. Lincoln Ave., Urbana, Illinois 61802, USA