1. Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada K1H 8M5
2. National Laboratory for Microbiology, Winnipeg, Manitoba, Canada K1A 0L2
3. Department of Biochemistry, Microbiology and Immunology and Centre for Research in Biopharmaceuticals and Biotechnology, University of Ottawa, Ottawa, Canada K1H 8M5