1. Department of Child Health, Dr Sardjito Hospital/Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
2. Centre for Child Health - Paediatric Research Office, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia
3. Department of Paediatrics, Centre for International Child Health, University of Melbourne, Melbourne, Australia
4. Group A Streptococcal Research Group, Murdoch Childrens Research Institute, Melbourne, Australia
5. Department of General Medicine, Royal Children’s Hospital, Melbourne, Victoria, Australia