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Article History

Received: 24 November 2023

Accepted: 13 November 2024

First Online: 3 December 2024

Declarations

:

: Permission to recruit patients to the MRC BO03/EORTC 80861 and MRC BO06/EORTC 80931 protocol was provided by the appropriate national and local regulatory and local committees. Link-anonymised data were used for the purposes of this study, and the use of the data was consistent with the consent taken. Because it involved retrospective review, the project was exempt from Human Subjects protection requirements by the Institutional Review Board of the European Organisation for the Research and Treatment of Cancer.

: Not required.

: The authors declare no competing interests.