1. Department of Otolaryngology‐ Head and Neck Surgery Newcastle‐upon‐Tyne Hospitals NHS Foundation Trust Newcastle‐upon‐Tyne UK
2. Population Health Sciences Institute Newcastle University Newcastle‐upon‐Tyne UK
3. National Institute of Health Research Bristol Biomedical Research Centre University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol Bristol UK
4. Bristol Dental School University of Bristol Bristol UK