Funding for this research was provided by:
Research for Patient Benefit Programme (PB-PG-1013-32017)
Received: 24 September 2018
Accepted: 1 March 2019
First Online: 16 April 2019
Ethics approval and consent to participate
: National Research Ethics Service London Harrow granted favourable opinion (for the whole study) on 1 March 2016 (reference 15/LO/2069). Informed consent will be obtained from patients before participation into the study.
: Not applicable.
: The authors declare that they have no competing interests.
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