1 Department of Medicine (Waters) and Division of Infectious Diseases (Beliavsky, Gough), Department of Medicine, University of Toronto; Division of Infectious Diseases (Gough), St. Michael's Hospital, Toronto, Ont. mara.waters@mail.utoronto.ca.
2 Department of Medicine (Waters) and Division of Infectious Diseases (Beliavsky, Gough), Department of Medicine, University of Toronto; Division of Infectious Diseases (Gough), St. Michael's Hospital, Toronto, Ont.