Funding for this research was provided by:
National Institute for Health Research (N/A)
Received: 21 February 2019
Accepted: 15 May 2019
First Online: 31 May 2019
Ethics approval and consent to participate
: The Faculty of Medicine and Dentistry Committee for Research Ethics, University of Bristol (Reference No 30641) granted ethical permission. All participants gave informed consent (written or audio for telephone interviews) prior to participation. Verbal consent was audio recorded for all telephone interviews, as approved by the ethics committee.
: Informed consent for publication from healthcare professionals participating in an interview was obtained.
: The authors declare that they have no competing interests.
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