Funding for this research was provided by:
Cancer Research UK (C55650/A21464, C8640/A23385)
Received: 22 April 2020
Accepted: 10 January 2021
First Online: 23 January 2021
Ethics approval and consent to participate
: This study was approved by the East of England- Cambridge East NHS Research Ethics Committee (ref: 18/EE/0001) and Health Research Authority on 6th March 2018. Written informed consent was obtained from each patient.
: Not applicable.
: None of the authors have competing interests.