Received: 23 July 2019
Accepted: 26 December 2019
First Online: 31 January 2020
Ethics approval and consent to participate
: Ethical approval was gained from The University of Manchester Research Ethics Committee (Ref: 2017–0945-1936). Written informed consent was obtained before the interview took place, and consent was confirmed verbally at the beginning of each interview.
: Not applicable.
: The authors declare that they have no competing interests.