Funding for this research was provided by:
Research Trainees Coordinating Centre (DRF-2015-08-013)
Text and Data Mining valid from 2020-03-06
Received: 4 August 2019
Accepted: 4 February 2020
First Online: 6 March 2020
Ethics approval and consent to participate
: Ethics approval was granted by the University of Sheffield, School of Health and related Research Ethics Committee (ref 009699). All participants were issued an information sheet and were required to sign a consent form or give verbal consent.
: Informed consent was obtained from participants to use their data for publication.
: The authors declare that they have no competing interests.