1. Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana, USA
2. Louisiana Animal Disease Diagnostic Laboratory, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana, USA
3. National Emerging Infectious Diseases Laboratories (NEIDL), Boston University, Boston, Massachusetts, USA
4. Department of Pathology and Laboratory Medicine, Boston University Chobanian and Avedisian School of Medicine, Boston, Massachusetts, USA
5. Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA