Funding for this research was provided by:
Dunhill Medical Trust (RTF115/0117)
Addenbrooke's Charitable Trust, Cambridge University Hospitals (32/17 A(ii))
Science Foundation Ireland (18/FRL/6188)
Received: 28 January 2020
Accepted: 16 April 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: Ethical approval was granted by the London Queen Square Research Ethics Committee (17/LO/1817). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.