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.
Hazen DA, Mannino DM, Clayton R.Hazen DA, et al. Among authors: clayton r.Int J Environ Res Public Health. 2008 Dec;5(4):230-42. doi: 10.3390/ijerph5040230.Int J Environ Res Public Health. 2008.PMID: 19190354Free PMC article.
Zanjani F, Allen HK, Schoenberg N, Martin C, Clayton R.Zanjani F, et al. Among authors: clayton r.Health Educ Res. 2018 Aug 1;33(4):261-270. doi: 10.1093/her/cyy021.Health Educ Res. 2018.PMID: 29982394Free PMC article.