[1] QEII Med Ctr, PathW Lab Med WA, Dept Microbiol, Nedlands, WA 6009, Australia
[2] Univ Western Australia, Sch Biomed Biomol & Chem Sci, Nedlands, WA 6009, Australia
[3] Univ Western Australia, Sch Med & Clin Pharmacol, Nedlands, WA 6009, Australia
[4] Univ Western Australia, Sch Pathol & Lab Med, Nedlands, WA 6009, Australia
[5] WHO Collaborating Ctr Reference & Res Influenza, Melbourne, Vic, Australia