1. Pinderfields Hospital, Wakefield WF1 4DG, UK
2. ICE Postgraduate Dental Institute and Hospital, Mary Seacole Building, Frederick Road Campus, University of Salford, Broad St, Salford M6 6PU, UK
3. Faculty of Health and Medicine, Health Innovation One, Lancaster University, Sir John Fisher Dr, Bailrigg, Lancaster LA1 4AT, UK
4. University Hospitals of Morecambe Bay NHS Foundation Trust, Kendal LA9 7RG, UK