Article History
Received: 6 November 2019
Revised: 28 May 2020
Accepted: 3 July 2020
First Online: 30 July 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: Not applicable.
: G.I.M. is an editorial board member of the <i>British Journal of Cancer</i>. The remaining authors declare no competing interests.
: None.