1. Division of Pediatric Medicine, Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
2. Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
3. Child Health Evaluative Sciences, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
4. ICES, Ottawa, Ontario, Canada
5. The Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
6. Ontario Child Health Support Unit (OCHSU), Ottawa, Ontario, Canada
7. Children’s Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
8. Division of Pediatric Emergency Medicine, Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
9. ICES, Toronto, Ontario, Canada
10. for the Canadian Paediatric Inpatient Research Network (PIRN)