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.
Hom JK, Wang B, Chetty S, Giddy J, Mazibuko M, Allen J, Walensky RP, Losina E, Freedberg KA, Bassett IV.Hom JK, et al. Among authors: freedberg ka.PLoS One. 2012;7(8):e43281. doi: 10.1371/journal.pone.0043281. Epub 2012 Aug 17.PLoS One. 2012.PMID: 22912845Free PMC article.
Freedberg KA, Scharfstein JA, Seage GR 3rd, Losina E, Weinstein MC, Craven DE, Paltiel AD.Freedberg KA, et al.JAMA. 1998 Jan 14;279(2):130-6. doi: 10.1001/jama.279.2.130.JAMA. 1998.PMID: 9440663