[1] Univ Ottawa, Dept Biochem, Ottawa, ON K1N 6N5, Canada
[2] Univ Ottawa, Dept Microbiol & Immunol, Ottawa, ON K1N 6N5, Canada
[3] Univ Ottawa, Dept Pathol & Lab Med, Ottawa, ON K1N 6N5, Canada
[4] Childrens Hosp Eastern Ontario, Res Inst, Div Virol & Mol Immunol, Ottawa, ON K1H 8L1, Canada