1. Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
2. Department of Pediatrics, Children’s Hospital of Eastern Ontario, Ottawa, Ontario, Canada
3. School of Medicine, Trinity College, Dublin, Ireland
4. Department of Volunteers, Communication and Information Resources, Children’s Hospital of Eastern Ontario, Ottawa, Ontario, Canada
5. Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
6. Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada