Funding for this research was provided by:
National Institute for Health Research (SPCR 219)
Article History
Received: 30 December 2018
Accepted: 31 January 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: This study received ethical approval from the National Ethics Research Service (ref 14/LO/1550) and local Research and Development bodies. Written consent was obtained from study participants.
: Not applicable.
: The authors declare that they have no competing interests.