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.
Drexler M, Erbel R, Müller U, Wittlich N, Mohr-Kahaly S, Meyer J.Drexler M, et al.Am J Cardiol. 1990 Jun 15;65(22):1491-6. doi: 10.1016/0002-9149(90)91361-9.Am J Cardiol. 1990.PMID: 2353657