1. Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
2. Division of Infectious Disease, The Hospital for Sick Children, Toronto, ON, Canada
3. Institute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, ON, Canada
4. Division of Respirology, The Hospital for Sick Children, Toronto, ON, Canada
5. Public Health Ontario, Toronto, ON, Canada
6. Institute for Clinical Evaluative Sciences, Toronto, ON, Canada