_:n66bd35d3a85d4f7c952b67fd4ec35462xb1
<http://schema.org/image>
<https://static-content.springer.com/image/art%3A10.1186%2Fs12909-021-02678-9/MediaObjects/12909_2021_2678_Fig1_HTML.png>
<https://bmcmededuc.biomedcentral.com/articles/10.1186/s12909-021-02678-9>