1. Department of Microbiology and Immunology, Virginia Commonwealth University Medical Center, Richmond, Virginia, USA
2. Institute of Infectious Diseases and Zoonoses, Department of Veterinary Sciences, Faculty of Veterinary Medicine, Ludwig-Maximilians-University, Munich, Germany
3. Department of Clinical Sciences, The Comparative Medicine Institute, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
4. Department of Large Animal Clinical Sciences, VA-MD College of Veterinary Medicine, Blacksburg, Virginia, USA
5. Department of Oral and Craniofacial Molecular Biology, Philips Institute for Oral Health Research, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, USA