1 Department of Family Medicine (Dalcin), Western University, London, Ont.; Departments of Pediatrics, and of Microbiology & Immunology (Halperin); Canadian Centre for Vaccinology, Dalhousie University; IWK Health Centre and Nova Scotia Health (Halperin), Halifax, NS ddalcin@nosm.ca.
2 Department of Family Medicine (Dalcin), Western University, London, Ont.; Departments of Pediatrics, and of Microbiology & Immunology (Halperin); Canadian Centre for Vaccinology, Dalhousie University; IWK Health Centre and Nova Scotia Health (Halperin), Halifax, NS.