1. School of Psychological Sciences and Health, University of Strathclyde, Glasgow, Scotland, UK
2. Adult Psychology Unit, Falkirk Community Hospital, Falkirk, Scotland, UK
3. School of Health, Nursing and Midwifery, University of West of Scotland, Hamilton, Scotland, UK
4. Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
5. Institute of Health and Wellbeing, University of Glasgow, Glasgow, Scotland, UK
6. CRUK Clinical Trials Unit, Institute of Cancer Sciences, University of Glasgow, Glasgow, Scotland, UK