1. Department of Surgery, College of Medicine, Blantyre, Malawi
2. Centre for International Health, University of Bergen, Bergen, Norway
3. Division of Oto-rhino-laryngology, Gelre Hospitals Zutphen, The Netherlands
4. International Centre for Evidence in Disability (ICED), London School of Hygiene and Tropical Medicine, London, UK
5. Division of Otolaryngology, University of Cape Town, Cape Town, South Africa