1 Department of Oral Medicine, Liverpool University Dental Hospital, UK; The University of Liverpool, Cancer Research Centre, Department of Molecular and Clinical Cancer Medicine, UK. Electronic address: E.A.Field@liv.ac.uk.
2 Department of Oral Medicine, Liverpool University Dental Hospital, UK; The University of Liverpool, Cancer Research Centre, Department of Molecular and Clinical Cancer Medicine, UK.
3 Leeds Teaching Hospitals NHS Foundation Trust, West Yorkshire, UK.
4 Department of Oral Medicine, Liverpool University Dental Hospital, UK.
5 Regional Maxillofacial Unit, Aintree University Hospitals NHS Foundation Trust, Liverpool, UK; Evidence-Based Practice Research Centre (EPRd), Faculty of Health, Edge Hill University, Ormskirk, UK.
6 The University of Liverpool, Cancer Research Centre, Department of Molecular and Clinical Cancer Medicine, UK; Oral & Maxillofacial Pathology, Pathology Department, Liverpool Clinical Laboratories, UK.
7 The University of Liverpool, Cancer Research Centre, Department of Molecular and Clinical Cancer Medicine, UK; Regional Maxillofacial Unit, Aintree University Hospitals NHS Foundation Trust, Liverpool, UK.