Funding for this research was provided by:
National Institute for Health Research (CS-2013-13-009)
Received: 28 October 2019
Accepted: 29 January 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: Ethics approval for this trial was granted by the North West - Greater Manchester West Research Ethics Committee (Ref 17/NW/0014). All participants provided a full written informed consent before enrolment.
: Not applicable
: The authors declare that they have no competing interests.