Received: 11 January 2019
Accepted: 5 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: The University of Sydney Human Research Ethics Committee approved the study. Written consent for participation was obtained from participants to enable us to include their data from this study.
: Not applicable.
: Annette Burgess and Chris Roberts are members of the Editorial Board for BMC Medical Education. All other authors declare that they have no competing interests.