1. Centre for Health and Wellbeing Across the Lifecourse, Department of Health Sciences, Brunel University London, Uxbridge, United Kingdom
2. Court Road, Newton Ferrers, Plymouth, United Kingdom
3. School of Natural and Environmental Sciences, University of Newcastle Upon Tyne, Newcastle, United Kingdom
4. Centre for Pain Research, University of Bath, Claverton Down, Bath, United Kingdom
5. Cochrane Pain, Palliative and Supportive Care Review Group, Oxford University Hospitals, Oxford, United Kingdom
6. Research Department of Clinical, Educational and Health Psychology, University College London, London, United Kingdom