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.
Ruiter G, Wong YY, Raijmakers P, Huisman MC, Lammertsma AA, Knaapen P, de Man FS, Westerhof N, van der Laarse WJ, Vonk-Noordegraaf A.Ruiter G, et al. Among authors: lammertsma aa.Pulm Circ. 2013 Sep;3(3):647-53. doi: 10.1086/674335. Epub 2013 Nov 18.Pulm Circ. 2013.PMID: 24618549Free PMC article.