Received: 2 February 2020
Accepted: 17 June 2020
First Online: 6 July 2020
Ethics approval and consent to participate
: Ethics approval was received according to research law and regulations in the UK. Informed consent was obtained before interviews were conducted, verbally and in writing. One participant provided verbal consent for telephone interview, but did not return a written consent form. The data from this interview was therefore excluded from analysis. The study received ethics approval from the University of Sheffield Medical School Research Ethics Committee with the reference number 024991.
: Not applicable.
: The authors declare that they have no competing interests.