1. Leeds Teaching Hospitals and St James's Institute of Oncology, Leeds General Infirmary, Leeds
2. Evidence-Based Practice Research Centre (EPRC), Faculty of Health, Edge Hill University, Ormskirk
3. St James's Institute of Oncology, Leeds;, Ormskirk
4. Health Research, Edge Hill University, Ormskirk
5. PSSRU, University of Manchester, Manchester
6. Leeds Teaching Hospitals, Breast Surgery Department, Leeds General Infirmary, Leeds
7. Department of Head and Neck Surgery, Liverpool CR-UK Centre, Department of Molecular and Clinical Cancer Medicine, Liverpool
8. Regional Maxillofacial Unit, University Hospital Aintree, Liverpool, UK