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.
Brunelli A, Berrisford RG, Rocco G, Varela G; European Society of Thoracic Surgeons Database Committee.Brunelli A, et al. Among authors: varela g.Eur J Cardiothorac Surg. 2009 May;35(5):769-74. doi: 10.1016/j.ejcts.2009.01.037. Epub 2009 Mar 9.Eur J Cardiothorac Surg. 2009.PMID: 19272784