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.
Rifkin A, Rifkin W.Rifkin A, et al. Among authors: rifkin w.JAMA. 2004 Dec 1;292(21):2577-8; author reply 2578-9. doi: 10.1001/jama.292.21.2577-b.JAMA. 2004.PMID: 15572708No abstract available.