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.
Austin AM, Ramkumar N, Gladders B, Barnes JA, Eid MA, Moore KO, Feinberg MW, Creager MA, Bonaca M, Goodney PP.Austin AM, et al. Among authors: gladders b.BMC Med Res Methodol. 2022 Nov 23;22(1):300. doi: 10.1186/s12874-022-01774-8.BMC Med Res Methodol. 2022.PMID: 36418976Free PMC article.