1. Division of Infectious Diseases, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada;
2. Division of Infectious Diseases, Department of Paediatrics, Stollery Children’s Hospital, University of Alberta, Edmonton Alberta, Canada;
3. Division of Infectious Diseases, Department of Paediatrics, Montreal Children’s Hospital, McGill University, Montreal, Québec, Canada;
4. Vaccine Evaluation Center, BC Children’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada;
5. Canadian Center for Vaccinology, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia, Canada;
6. Section of Infectious Diseases, Department of Paediatrics, Alberta Children’s Hospital, University of Calgary, Calgary, Alberta, Canada; and
7. Centre for Immunization & Respiratory Infectious Diseases, Public Health Agency of Canada, Ottawa, Canada