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.
Platts-Mills TA, Erwin E, Heymann P, Woodfolk J.Platts-Mills TA, et al.Allergy. 2005;60 Suppl 79:25-31. doi: 10.1111/j.1398-9995.2005.00854.x.Allergy. 2005.PMID: 15842230Review.