Funding for this research was provided by:
United Kingdom Clinical Research Collaboration (MR/KO232331/1)
medical research council UK (MC/PC/17212)
Received: 25 February 2019
Accepted: 24 July 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: Ethics clearance was obtained from the Cardiff University School of Social Sciences ethics committee, and the research has therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Students could opt out of the survey.
: Not applicable.
: The authors declare that they have no conflict of interest.