Text and Data Mining valid from 2019-08-06
Received: 7 June 2019
Accepted: 22 July 2019
First Online: 6 August 2019
Ethics approval and consent to participate
: The study was approved by the University of Manchester Ethics committee (ref. 2017–2112-3266) and all participants gave consent by completing the survey.
: Not applicable.
: The authors declare that they have no competing interests.