1. School of Population and Public Health University of British Columbia Vancouver British Columbia Canada
2. St. Paul's Sinus Centre Department of Surgery, University of British Columbia Vancouver British Columbia Canada
3. Devil's Staircase Consulting West Vancouver British Columbia Canada
4. Department of Surgery University Hospital of the West Indies Mona Jamaica
5. Department of Otolaryngology—Head and Neck Surgery King Saud University Riyadh Saudi Arabia
6. Prince Mohammed Bin Abdulaziz Hospital National Guard Health Affairs Medina Saudi Arabia
7. British Columbia Centre for Disease Control Vancouver British Columbia Canada