1 Division of Infectious Diseases (Leis, Gold), Department of Medicine; Centre for Quality Improvement and Patient Safety (Leis); Department of Otolaryngology - Head and Neck Surgery (Rutka), University of Toronto, Toronto, Ont. jerome.leis@sunnybrook.ca.
2 Division of Infectious Diseases (Leis, Gold), Department of Medicine; Centre for Quality Improvement and Patient Safety (Leis); Department of Otolaryngology - Head and Neck Surgery (Rutka), University of Toronto, Toronto, Ont.