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.
Tefferi A, Solberg LA, Silverstein MN.Tefferi A, et al.Am J Med. 2000 Aug 1;109(2):141-9. doi: 10.1016/s0002-9343(00)00449-6.Am J Med. 2000.PMID: 10967156Review.