1. BC Rotary Hearing and Balance Centre, Division of Otolaryngology–Head and Neck Surgery, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
2. Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
3. Head and Neck Surgery and Communication Sciences, School of Medicine, Duke University, Durham, North Carolina, USA
4. Duke Global Health Institute, Durham, North Carolina, USA
5. Center for Health Policy and Inequalities Research, Duke University, Durham, North Carolina, USA