1. Department of Psychology, The Hospital for Sick Children, Toronto, ON, Canada
2. Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, Toronto, ON, Canada
3. University of Toronto, Toronto, ON, Canada
4. Child Health Evaluative Sciences, Research Institute, The Hospital for Sick Children, Toronto, ON, Canada
5. Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, ON, Canada
6. Mary Jo Haddad Nursing Chair in Child Health, The Hospital for Sick Children, Toronto, ON, Canada