1. Immunization and Respiratory Infections Division, Centre for Infectious Disease Prevention and Control, Population and Public Health Branch, Health Canada, Otawa Canada
2. lnstitut National de Santé Publique du Quebec and Public Health Research Unit, Laval University, Quebec Canada
3. National Microbiology Laboratory, Population and Public Health Branch, Health Canada, Winnipeg cANADA
4. Health Strategies Division, Alberta Health & Wellness, Edmonton Canada