[1] Ctr Biomed Res, Burnet Inst, Melbourne, Vic, Australia
[2] Monash Univ, Dept Microbiol, Melbourne, Vic 3004, Australia
[3] Univ Melbourne, Dept Microbiol & Immunol, Melbourne, Vic, Australia
[4] ReProtect Inc, Baltimore, MD USA
[5] Johns Hopkins Univ, Dept Biophys, Baltimore, MD USA