1. Institute of Head & Neck Studies and Education, University of Birmingham, Birmingham, UK
2. Warwick Clinical Trials Unit, University of Warwick, Coventry, UK
3. Paul Strickland Scanner Centre, Mount Vernon Hospital, Northwood, UK
4. Academic Unit of Health Economics, University of Leeds, Leeds, UK
5. Royal Marsden Hospital, London, UK
6. University Hospital Birmingham, Birmingham, UK
7. Department of Pathology, Federal University of Espírito Santo, Vitória, Brazil
8. Centre for Oral Health Research, Newcastle University, Newcastle upon Tyne, UK
9. University Hospitals Coventry and Warwickshire, Coventry, UK