1. National Centre for Immunisation Research and Surveillance of Vaccine Preventable Diseases, Royal Alexandra Hospital for Children and the University of Sydney, Sydney
2. Centre for Epidemiology, Indicators, Research and Evaluation, Western Sydney Area Public Health Unit, Sydney
3. South Australian Tuberculosis Services, Royal Adelaide Hospital, Adelaide, Australia
4. Department of Paediatrics, Women's and Children's Hospital, South Australian Immunisation Coordination Unit, Department of Human Services, Adelaide, Australia