1. Section of Otolaryngology–Head and Neck Surgery, Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, Canada
2. Deparment of Otolaryngology–Head and Neck Surgery, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada
3. Department of Otolaryngology–Head and Neck Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
4. Division of Infectious Diseases, Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Canada