Funding for this research was provided by:
Health Services and Delivery Research Programme (16/48/07)
Text and Data Mining valid from 2019-06-29
Received: 7 February 2019
Accepted: 18 June 2019
First Online: 29 June 2019
Ethics approval and consent to participate
: Ethical approval was given by the North West Greater Manchester East ethics committee (17/NW/0426). All participants gave written informed consent before taking part in the study.
: Not applicable.
: The authors declare that they have no competing interests.