1. Special Pathogens, National Microbiology Laboratory, Public Health Agency of Canada
2. Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Canada
3. Department of Paediatrics and Child Health, College of Medicine, Faculty of Health Sciences, University of Manitoba, Winnipeg, Canada
4. Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana