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.
Whiting RE, Yao G, Narfström K, Pearce JW, Coates JR, Dodam JR, Castaner LJ, Katz ML.Whiting RE, et al.Invest Ophthalmol Vis Sci. 2013 Aug 13;54(8):5432-40. doi: 10.1167/iovs.13-12012.Invest Ophthalmol Vis Sci. 2013.PMID: 23847311Free PMC article.