An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Pelletier-Bui AE, Schrepel C, Smith L, Zhang XC, Kellogg A, Edens MA, Jones CW, Hillman E.Pelletier-Bui AE, et al. Among authors: zhang xc.BMC Med Educ. 2020 Dec 7;20(1):495. doi: 10.1186/s12909-020-02415-8.BMC Med Educ. 2020.PMID: 33287824Free PMC article.