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.
Joo HC, Chang BC, Youn YN, Yoo KJ, Lee S.Joo HC, et al.Yonsei Med J. 2012 Sep;53(5):915-23. doi: 10.3349/ymj.2012.53.5.915.Yonsei Med J. 2012.PMID: 22869473Free PMC article.
Youn YN, Yi G, Lee S, Joo HC, Yoo KJ.Youn YN, et al. Among authors: joo hc.Am Heart J. 2014 Jun;167(6):818-25. doi: 10.1016/j.ahj.2014.01.016. Epub 2014 Mar 1.Am Heart J. 2014.PMID: 24890530