Article History
Received: 8 November 2019
Accepted: 28 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: Ethical approval was granted by the Imperial College Medical Education Ethics Committee. Written consent was obtained from study participants.
: Consent to participate in the study and to allow data to be published was obtained from all study participants.
: The authors declare that they have no competing interests.