1. WHO Collaborating Centre for Reference and Research on Influenza, Peter Doherty Institute for Infection and Immunity, Melbourne, VIC.
2. Discipline of General Practice, University of Adelaide, Adelaide, SA.
3. Microbiology and Infectious Diseases, SA Pathology, Adelaide, SA.
4. Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC.
5. Department of Infectious Diseases, Alfred Health, Melbourne, VIC.