[1] The University of Manchester,National Institute for Health Research School for Primary Care Research, School of Health Sciences, Faculty of Biology, Medicine and Health
[2] The University of Manchester,Centre for Biostatistics, School of Health Sciences, Faculty of Biology, Medicine and Health
[3] University of Manchester,Manchester Centre for Health Psychology, Division of Psychology & Mental Health, School of Health Sciences
[4] NIHR ARC Greater Manchester,Centre for Primary Care and Health Services Research, School of Health Sciences
[5] The University of Manchester,undefined