Funding for this research was provided by:
Cancer Research UK (RG14230, RG23772)
Medical Research Council (RG19715)
Text and Data Mining valid from 2019-10-28
Received: 11 April 2019
Accepted: 10 October 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: The study was approved by the Norfolk District Health Authority Ethics Committee and all participants gave written, informed consent.
: Not applicable.
: The authors declare that they have no competing interests.