1. Department of Anaesthesia and Pain Management, Princess Margaret Hospital for Children, Perth, Western Australia
2. Department of Anaesthesia and Pain Management, Princess Margaret Hospital for Children, Perth, Western Australia, and School of Computer Science and Software Engineering, The University of Western Australia, Perth, Western Australia
3. Department of Anaesthesia and Pain Management, Princess Margaret Hospital for Children, Perth, Western Australia, School of Medicine and Pharmacology, The University of Western Australia, Perth, Western Australia
4. Department of Anaesthesia and Pain Management, Princess Margaret Hospital for Children, Perth, Western Australia, and Chair of Paediatric Anaesthesia, School of Medicine and Pharmacology, The University of Western Australia, Perth, Western Australia