1. Special Pathogens Program, Laboratory for Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, R3E 3R2 Canada
2. Department of Medical Microbiology and
3. Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, R2H 2A6 Canada
4. Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840, USA