1. 1KU Leuven, Department of Microbiology and Immunology, Laboratory of Clinical Virology, Rega Institute for Medical Research, Herestraat 49/Box 1040, BE3000 Leuven, Belgium
2. 2College of Veterinary Medicine, Michigan State University Veterinary Diagnostic Laboratory, Lansing, Michigan 48910, USA
3. 3Dermatology for Animals, Gilbert, Arizona 85233, USA