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.
Krzych ŁJ, Czempik PF.Krzych ŁJ, et al. Among authors: czempik pf.Cardiol J. 2018;25(2):254-259. doi: 10.5603/CJ.a2017.0054. Epub 2017 May 12.Cardiol J. 2018.PMID: 28497841Free article.