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.
Sirovich BE, Gottlieb DJ, Welch HG, Fisher ES.Sirovich BE, et al. Among authors: welch hg.Arch Intern Med. 2005 Oct 24;165(19):2252-6. doi: 10.1001/archinte.165.19.2252.Arch Intern Med. 2005.PMID: 16246991
Sirovich BE, Gottlieb DJ, Welch HG, Fisher ES.Sirovich BE, et al. Among authors: welch hg.Ann Intern Med. 2006 May 2;144(9):641-9. doi: 10.7326/0003-4819-144-9-200605020-00007.Ann Intern Med. 2006.PMID: 16670133Free article.