title: The authors reply.
authors.affiliation: Division of Infectious Diseases, Department of Medicine & Clinical Epidemiology, Sunnybrook Health Sciences Centre, University of Toronto and Adjunct Scientist, Toronto, ON, Canada, Institute for Clinical Evaluative Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Medicine and Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada.
authors.forename: Nick
authors.initials: N
authors.lastname: Daneman
authors.forename: Asgar H
authors.initials: AH
authors.lastname: Rishu
authors.forename: Robert A
authors.initials: RA
authors.lastname: Fowler