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.
Shahar E, Burke GL, Cushman M, Heckbert SR, Ouyang P, Szklo M.Shahar E, et al. Among authors: burke gl.Prev Med. 2008 Jul;47(1):38-45. doi: 10.1016/j.ypmed.2007.12.013. Epub 2007 Dec 27.Prev Med. 2008.PMID: 18234323Free PMC article.
Klein R, Knudtson MD, Klein BE, Wong TY, Cotch MF, Liu K, Cheng CY, Burke GL, Saad MF, Jacobs DR Jr, Sharrett AR.Klein R, et al. Among authors: burke gl.Ophthalmology. 2008 Oct;115(10):1742-9. doi: 10.1016/j.ophtha.2008.03.021. Epub 2008 Jun 5.Ophthalmology. 2008.PMID: 18538409Free PMC article.