1 Division of Infectious Diseases, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Canada; Department of Infectious Diseases, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
2 Interdepartmental Division of Critical Care Medicine, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Canada.
3 Division of Infectious Diseases, Toronto General Hospital, University Health Network, University of Toronto, Toronto, Canada. Electronic address: Shahid.Husain@uhn.ca.