1. Critical Care Research Group, The Prince Charles Hospital, Brisbane, Queensland, Australia.
2. Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia.
3. Paediatric Critical Care Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
4. Department of Paediatric Intensive Care Medicine, Queensland Children's Hospital, South Brisbane, Queensland, Australia.
5. Acquired Brain Injury in Children Research Group, Child Health Research Centre, The University of Queensland, Brisbane, Queensland, Australia.