1. Queensland Children's Medical Research Institute, University of Queensland, Brisbane, QLD.
2. School of Population Health, University of Queensland, Brisbane, QLD.
3. Metro South Public Health Unit, Brisbane, QLD.
4. Communicable Diseases Unit, Queensland Health, Brisbane, QLD.
5. Microbiology Department, Sullivan Nicolaides Pathology, Brisbane, QLD.
6. National Centre for Immunisation Research and Surveillance, Sydney, NSW.
7. Health Protection NSW, NSW Health, Sydney, NSW.