1. Division of Infectious Diseases, Department of Pediatrics, The Hospital for Sick Children , Toronto, Ontario , Canada
2. Public Health Ontario , Toronto, Ontario , Canada
3. Department of Pediatrics, University of Toronto , Toronto, Ontario , Canada
4. Division of Pediatric Medicine, Department of Pediatrics, The Hospital for Sick Children , Toronto, Ontario , Canada
5. Child Health Evaluative Sciences, SickKids Research Institute , Toronto, Ontario , Canada
6. Biostatistics Design and Analysis Unit, Research Institute, The Hospital for Sick Children , Toronto, Ontario , Canada
7. Public Health Ontario Laboratory , Toronto, Ontario , Canada
8. Dalla Lana School of Public Health, University of Toronto , Toronto, Ontario , Canada
9. Unity Health , Toronto, Ontario , Canada
10. The Hospital for Sick Children , Toronto, Ontario , Canada
11. Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Oxford Population Health, Nuffield Department of Population Health, University of Oxford , Oxford , United Kingdom
12. Department of Laboratory Medicine and Pathobiology, University of Toronto , Toronto, Ontario , Canada
13. Division of Microbiology, Department of Pediatric Laboratory Medicine, The Hospital for Sick Children , Toronto, Ontario , Canada