Funding for this research was provided by:
Irish Health Research Board (HRA-HSR-2015-1071)
Received: 13 August 2020
Accepted: 19 October 2020
First Online: 5 November 2020
Ethics approval and consent to participate
: Institutional approval was obtained from the clinical effectiveness unit in St Bartholomew's Hospital, and all participants consented to participation.
: Not applicable.
: The authors declare that they have no competing interests.