Susy S Hota1,2,3, George Tomlinson3,4, Susan M Poutanen2,5,6. 1. Department of Infection Prevention and Control, University Health Network, Toronto, Ontario, Canada. 2. Department of Medicine, University of Toronto, Canada. 3. Department of Medicine, University Health Network, Toronto, Ontario, Canada. 4. Institute of Health Policy, Management and Evaluation and Dalla Lana School of Public Health, University of Toronto, Canada. 5. Department of Microbiology, University Health Network/Sinai Health System,Toronto, Ontario, Canada. 6. Department of Laboratory Medicine and Pathobiology, University of Toronto, Canada.