1. Liverpool Head and Neck Centre School of Health Science University of Liverpool Liverpool UK
2. Population Health Sciences Institute Newcastle University Centre for Cancer Newcastle University Newcastle upon Tyne UK
3. South Tyneside and Sunderland NHS Foundation Trust Sunderland UK
4. Bristol Speech and Language Therapy Research Unit Southmead Hospital North Bristol NHS Hospital Trust Bristol UK
5. NIHR Bristol Biomedical Research Centre University of Bristol and Weston NHS Foundation Trust and University of Bristol UK and Bristol Dental School University of Bristol Bristol UK
6. Bristol Dental School University of Bristol Bristol UK
7. Infections and Cancer Epidemiology German Cancer Research Center (DKFZ) Heidelberg Germany