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.
Parker JO, Vankoughnett KA, Farrell B.Parker JO, et al.Am J Cardiol. 1986 Jan 1;57(1):1-5. doi: 10.1016/0002-9149(86)90940-9.Am J Cardiol. 1986.PMID: 3079939Clinical Trial.
Parker JO, Vankoughnett KA, Farrell B.Parker JO, et al.Am J Cardiol. 1985 Nov 1;56(12):724-8. doi: 10.1016/0002-9149(85)91123-3.Am J Cardiol. 1985.PMID: 3933317Clinical Trial.