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Article History

Accepted: 20 November 2020

First Online: 23 December 2020

Declarations

:

: Owen J. Nicholas is partly funded by the South West Wales Cancer Fund (ref: 999278). Maria A. Hawkins is supported by funding from the National Institute of Health Research Biomedical Research Centre at the University College London Hospitals NHS Foundation Trust.

: Sarah H. Gwynne has received a small honorarium from the Rutherford Cancer Centre to attend a proton conference in the UK in 2018, where the registration fee and one night’s accommodation were paid for by the Rutherford Cancer Centre. Sarah H. Gwynne has worked with physicists at the Rutherford Cancer Centre on planning studies into the role of oesophageal proton radiotherapy as part of an academic collaboration. The work has undergone appropriate approvals and there has been no financial transactions. Owen J. Nicholas, Olivier Joseph, Annie Keane, Kate Cleary, Sue H. Campbell, Tom Crosby, Ganesh Radhakrishna and Maria A. Hawkins have no conflicts that are directly relevant to the content of this article.

: Not applicable.

: All participants were given prior information about the study and gave implied consent for participation by attending the focus groups. All participant data is anonymised.

: All participants are aware that their responses were recorded during the meeting to be used feedback to the trial development group and for the purposes of creating this report. All participant data is anonymised.

: Data are stored in an institutional repository and can be provided on request.

: Not applicable.

: Guarantor of integrity of the entire study: ON, MAH. Study concepts and design: OJN, GR, TC, SHG, MAH. Literature research: OJN. Clinical studies: OJN, GR, SHG, KC, OJ, AK, SHC (patient representative). Experimental studies/data analysis: OJN, GR, SG, KC, OJ, AK. Statistical analysis: not applicable. Manuscript preparation: OJN. Manuscript editing: all authors.