1. Nursing, Midwifery and Allied Health Professions Research Unit; Glasgow Caledonian University; Glasgow UK
2. Health Services Research Unit; University of Aberdeen; Aberdeen UK
3. Division of Psychology and Language Sciences; University College London; London UK
4. School of Health Sciences; University of East Anglia; Norwich UK
5. Institute of Applied Health Research; University of Birmingham; Birmingham UK
6. Birmingham Clinical Trials Unit; University of Birmingham; Birmingham UK
7. Department of Neurology; City Hospital, Sandwell and West Birmingham Hospitals NHS Trust; Birmingham UK
8. Faculty of Life Sciences & Medicine; King's College London; London UK