1. Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 1C9, Canada
2. Child Health Evaluative Sciences, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
3. Lawrence S. Bloomberg, Faculty of Nursing, University of Toronto, Toronto, ON M5T 1P8, Canada
4. Division of Emergency Medicine, The Hospital for Sick Children, Toronto, ON M5G 1E8, Canada
5. School of Computing, Engineering, and The Built Environment, Edinburgh Napier University, Edinburgh EH11 4BN, UK
6. School of Computing Science, University of Glasgow, Glasgow G12 8RZ, UK