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.
Ter-Pogossian MM, Klein MS, Markham J, Roberts R, Sobel BE.Ter-Pogossian MM, et al.Circulation. 1980 Feb;61(2):242-55. doi: 10.1161/01.cir.61.2.242.Circulation. 1980.PMID: 6965365No abstract available.