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.
Fraga S, Ramos E, Martins A, Samúdio MJ, Silva G, Guedes J, Oliveira Fernandes E, Barros H.Fraga S, et al.Rev Port Pneumol. 2008 Jul-Aug;14(4):487-507.Rev Port Pneumol. 2008.PMID: 18622526Free article.English, Portuguese.
Dias S, Fraga S, Barros H.Dias S, et al. Among authors: fraga s.J Immigr Minor Health. 2013 Feb;15(1):119-24. doi: 10.1007/s10903-012-9644-0.J Immigr Minor Health. 2013.PMID: 22618354