1. Department of Otolaryngology-Head and Neck Surgery; Sunderland Royal Hospital and Institute of Health and Society; Newcastle University; United Kingdom
2. Academic Foundation; Newcastle upon Tyne NHS Foundation Trust and Associate Clinical Research; Newcastle University; United Kingdom
3. Medical Statistics; Institute of Health and Society, Newcastle University; United Kingdom
4. Department of Speech and Language Therapy; Sunderland Royal Hospital; United Kingdom
5. Institute of Health and Society; Newcastle University; United Kingdom