1. Division of Infectious Diseases, Department of Medicine, Dalhousie University, Nova Scotia Health Authority, Halifax, Nova Scotia, Canada
2. Centre for Communicable Diseases and Infection Control, Public Health Agency of Canada, Ottawa, Ontario, Canada
3. Secteur Prévention et contrôle des maladies infectieuses, Direction régionale de santé publique, Centre intégré universitaire de santé et de services sociaux du Centre-Sud-de-l’île-de-Montréal, Montréal, Québec, Canada
4. Division of Infectious Diseases, Department of Medicine, University of Alberta, University of Alberta Hospital, Edmonton, Alberta, Canada