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.
Albert NM, Davis M, Young J.Albert NM, et al.Cleve Clin J Med. 2002 Apr;69(4):321-8. doi: 10.3949/ccjm.69.4.321.Cleve Clin J Med. 2002.PMID: 11996202Free article.Review.
Albert NM, Fonarow GC, Abraham WT, Gheorghiade M, Greenberg BH, Nunez E, O'Connor CM, Stough WG, Yancy CW, Young JB.Albert NM, et al.Am J Med. 2009 Apr;122(4):366-73. doi: 10.1016/j.amjmed.2008.09.046.Am J Med. 2009.PMID: 19332232