1. Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
2. Department of Anesthesia, University of Toronto, Toronto, Ontario, Canada
3. Child Health Evaluative Sciences, The Hospital for Sick Children, Toronto, Ontario, Canada
4. Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
5. Offord Centre for Child Studies, McMaster University, Hamilton, Ontario, Canada
6. Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada
7. Li Ka Shing Knowledge Institute of St Michael’s Hospital, Toronto, Ontario, Canada
8. Department of Anesthesia and Pain Management, Toronto General Hospital, Toronto, Ontario, Canada
9. Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada