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.
Bramham K, Thomas M, Nelson-Piercy C, Khamashta M, Hunt BJ.Bramham K, et al.Blood. 2011 Jun 23;117(25):6948-51. doi: 10.1182/blood-2011-02-339234. Epub 2011 Apr 28.Blood. 2011.PMID: 21527518Free article.