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.
Ahmed S, Campbell RM, Li JH, Wang LJ, Robinson-Bostom L.Ahmed S, et al.J Am Acad Dermatol. 2007 Nov;57(5):896-8. doi: 10.1016/j.jaad.2006.04.086. Epub 2007 Sep 12.J Am Acad Dermatol. 2007.PMID: 17845825Review.