[1] University of Leeds,Leeds Institute of Clinical Trials Research, Faculty of Medicine and Health
[2] Newcastle University,Biostatistics Research Group, Institute of Health and Society
[3] University of Edinburgh,Edinburgh Clinical Trials Unit, Usher Institute of Population Health Sciences and Informatics
[4] University of Oxford,Oxford Clinical Trials Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences
[5] Royal Marsden and Institute for Cancer Research Clinical Trials Units,Liverpool Clinical Trials Clinical Trials Research Centre, Department of Biostatistics
[6] The Royal Marsden NHS Foundation Trust,undefined
[7] University of Liverpool,undefined