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.
Ritchie D, Amos A, Phillips R, Cunningham-Burley S, Martin C.Ritchie D, et al. Among authors: amos a.BMC Public Health. 2009 Apr 22;9:112. doi: 10.1186/1471-2458-9-112.BMC Public Health. 2009.PMID: 19386111Free PMC article.
Ritchie D, Amos A, Martin C.Ritchie D, et al. Among authors: amos a.Health Place. 2010 May;16(3):461-9. doi: 10.1016/j.healthplace.2009.12.003. Epub 2009 Dec 16.Health Place. 2010.PMID: 20044297
Amos A, Greaves L, Nichter M, Bloch M.Amos A, et al.Tob Control. 2012 Mar;21(2):236-43. doi: 10.1136/tobaccocontrol-2011-050280. Epub 2011 Dec 13.Tob Control. 2012.PMID: 22166266Review.