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.
Kamp O, De Cock CC, Küpper AJ, Roos JP, Visser CA.Kamp O, et al. Among authors: roos jp.Am J Cardiol. 1992 Jun 1;69(17):1412-6. doi: 10.1016/0002-9149(92)90892-3.Am J Cardiol. 1992.PMID: 1590229