1. Department of Otolaryngology–Head and Neck Surgery, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
2. Department of Clinical Epidemiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
3. Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam, the Netherlands
4. Department of Undergraduate Medicine, City University of New York School of Medicine, New York, New York
5. ENT Department, Guy’s Hospital, London, United Kingdom