1. Canadian Cooperative Wildlife Health Centre, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
2. Prairie Diagnostic Services, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK S7N 5B4, Canada
3. Department of Virology, Erasmus Medical Centre, Dr. Molewaterplein 50, 3000DR Rotterdam, The Netherlands