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.
Iachan R, Pierannunzi C, Healey K, Greenlund KJ, Town M.Iachan R, et al. Among authors: greenlund kj.BMC Med Res Methodol. 2016 Nov 15;16(1):155. doi: 10.1186/s12874-016-0255-7.BMC Med Res Methodol. 2016.PMID: 27842500Free PMC article.
Okoro CA, Zhao G, Fox JB, Eke PI, Greenlund KJ, Town M.Okoro CA, et al. Among authors: greenlund kj.MMWR Surveill Summ. 2017 Feb 24;66(7):1-42. doi: 10.15585/mmwr.ss6607a1.MMWR Surveill Summ. 2017.PMID: 28231239Free PMC article.