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.
Lewis KB, Peter N; Heart & Stroke Foundation of Canada; Graham ID, Kothari A.Lewis KB, et al.Health Res Policy Syst. 2022 May 23;20(1):56. doi: 10.1186/s12961-022-00863-w.Health Res Policy Syst. 2022.PMID: 35606768Free PMC article.