1. Nuffield Department of Clinical Medicine, University of Oxford, Oxford;
2. Department of Nursing and Midwifery, University of Stirling, Stirling
3. Sir Michael Sobell House, Oxford Radcliffe Hospitals NHS Trust; University of Oxford, Oxford
4. Sir Michael Sobell House, Oxford Radcliffe Hospitals NHS Trust; Nuffield Department of Clinical Medicine and Harris Manchester College, University of Oxford, Oxford