1 Centre for Immunization Programs (Killikelly, Siu, Abrams), Public Health Agency of Canada; School of Epidemiology and Public Health (Siu), Faculty of Medicine, University of Ottawa; Public Health Agency of Canada (Salvadori), Ottawa, Ont. [email protected].
2 Centre for Immunization Programs (Killikelly, Siu, Abrams), Public Health Agency of Canada; School of Epidemiology and Public Health (Siu), Faculty of Medicine, University of Ottawa; Public Health Agency of Canada (Salvadori), Ottawa, Ont.