1. National Centre for Immunisation Research and Surveillance, The Children's Hospital at Westmead, Sydney, NSW.
2. Discipline of Paediatrics and Child Health, University of Sydney, Sydney, NSW.
3. Population Health, Hunter New England Population Health, Tamworth, NSW.
4. Western Sydney Sexual Health Centre, University of Sydney, Sydney, NSW.
5. School of Public Health, University of Sydney, Sydney, NSW.