Funding for this research was provided by:
Cancer Research UK
Received: 12 December 2017
Accepted: 21 May 2018
First Online: 4 June 2018
Ethics approval and consent to participate
: This project was approved by the ScHARR ethics committee, University of Sheffield (project ID: 03670). A market research company (Vision One) invited existing panel members to participate in the study. If they selected the link to the survey, they were directed to an information page about the study and provided consent by selecting the link to begin the survey.
: The authors declare that they have no competing interests.
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