[1] Cancer Research UK Primary Care Education Research Group,Department of Primary Care
[2] Cancer Epidemiology Unit,Department of Epidemiology and Public Health
[3] University of Oxford,undefined
[4] Oxford Centre for Monitoring and Diagnosis (MaDOx),undefined
[5] University of Oxford,undefined
[6] Kings College London,undefined
[7] Cancer Research UK Promoting Early Presentation Group,undefined
[8] Institute of Psychiatry,undefined
[9] St Thomas' Hospital,undefined
[10] Health Behaviour Research Centre,undefined
[11] University College London,undefined