Received: 20 May 2019
Accepted: 30 October 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: University of Sheffield ethical approval (reference 156927) and Health Research Authority governance (IRAS 243791) approvals were obtained. Participants gave their informed consent to participate by completing an informed consent form after having received a participant information sheet giving details of the study.
: Informed consent was obtained from all participants to publish anonymised quotes in publications.
: The authors declare that they have no competing interests.