1. SAEFVIC Immunisation Safety Group, Murdoch Childrens Research Institute, Melbourne, VIC.
2. Department of General Medicine, Royal Children's Hospital, Melbourne, VIC.
3. Department of Paediatrics, University of Melbourne, Melbourne, VIC.
4. Immunisation Service, Royal Children's Hospital, Melbourne, VIC.
5. Paediatric Infectious Diseases Unit, Monash Children's Hospital, Melbourne, VIC.