1. Pennsylvania Veterinary Laboratory, Pennsylvania Department of Agriculture, Harrisburg, PA, USA
2. Animal Health Diagnostic Center, Departments of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
3. Public & Ecosystem Health, Cornell Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
4. Veterinary Diagnostic Laboratory, Department of Veterinary Science, University of Kentucky, Lexington, KY, USA