Funding
NI is a PhD student funded by the Economic and Social Research Council (reference 150041616, https://www.ninedtp.ac.uk/). ES was a PhD student funded by Medical Research Council (reference MR/K501396/1, https://mrc.ukri.org/) at the time of conducting this study.
Born in Bradford was supported by a Wellcome Trust infrastructure grant (WT101597MA) and the National Institute for Health Research and Care (CLAHRC) (IS-CLA-0113-10020). The NIHR Clinical Research Network which provided delivery support for this study.