1. Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
2. Department of Health, Behavior and Society, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
3. Institute for Vaccine Safety, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Division of Translational Therapeutics, Department of Pediatrics, University of British Columbia, Vancouver, Canada
5. British Columbia Children’s Hospital Research Institute, University of British Columbia, Vancouver, Canada
6. Pharmaceutical Outcomes Program, British Columbia Children’s Hospital, Vancouver, Canada