Received: 7 September 2020
Accepted: 10 December 2020
First Online: 5 February 2021
Ethics approval and consent to participate
: Following all relevant guidelines, study received ethical approval from the UCL Research Ethics Committee (5490/001). Participation in the study was voluntary and informed consent to take part was contained in writing.
: Not applicable.
: All authors had financial support from the General Medical Council who commissioned this research. No authors have any other relationships or activities that could appear to have influenced the submitted work.