Received: 29 July 2019
Accepted: 21 February 2020
First Online: 17 March 2020
Ethics approval and consent to participate
: Guys’ Cancer Cohort is a Health Research Authority approved research database (Reference: 18/NW/0297). It received a favourable opinion on the 15th May 2018 from the North West- Haydock Research Ethics Committee.
: Not applicable.
: Dr. Mieke Van Hemelrijck is an Associate Editor for the BMC Cancer Journal.