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.
Bradley KA, Lapham GT, Hawkins EJ, Achtmeyer CE, Williams EC, Thomas RM, Kivlahan DR.Bradley KA, et al. Among authors: achtmeyer ce.J Gen Intern Med. 2011 Mar;26(3):299-306. doi: 10.1007/s11606-010-1509-4. Epub 2010 Sep 22.J Gen Intern Med. 2011.PMID: 20859699Free PMC article.