Funding for this research was provided by:
Health Technology Assessment Programme (15/170/02)
Received: 17 June 2018
Accepted: 26 December 2018
First Online: 14 January 2019
Ethics approval and consent to participate
: The study was approved by the Health Authority Approval (11/11/2017) and the London - Dulwich Research Ethics Committee (11/09/17) (reference: 17/LO/1463). Written informed consent will be obtained for all participants prior to taking part.
: Not applicable.
: The authors declare that they have no competing interests.
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