1. York Trials Unit, Department of Health Sciences, University of York, York, UK
2. Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Science, NIHR Biomedical Research Unit, University of Oxford, Oxford, UK
3. National Institute for Health Research School for Primary Care Research, Centre for Primary Care and Health Services Research, University of Manchester, Manchester, UK
4. Bangor University, Gwynedd, UK
5. School of Health and Related Research, University of Sheffield, Sheffield, UK
6. Bristol Trials Centre, Clinical Trials and Evaluation Unit, University of Bristol, Bristol, UK
7. School of Nursing and Midwifery, National University of Galway, Galway, Ireland
8. Department of Biostatistics and Health Informatics, King’s College London, Institute of Psychiatry, Psychology and Neuroscience, London, UK
9. Institute of Population Health Sciences, Queen Mary University of London, London, UK
10. Health Services Research Unit, University of Aberdeen, Health Sciences Building, Foresthill Aberdeen, Aberdeen, UK
11. Nottingham Clinical Trials Unit, University of Nottingham, Nottinghamshire, UK
12. School of Health Sciences, University of Manchester, Manchester, UK