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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
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The site is secure.
The https:// ensures that you are connecting to the
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and transmitted securely.
Trewavas A, Gilroy S.Trewavas A, et al.Trends Genet. 1991 Nov-Dec;7(11-12):356-61. doi: 10.1016/0168-9525(91)90255-o.Trends Genet. 1991.PMID: 1668186Review.