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.
Bedolla-Barajas M, Morales-Romero J, Robles-Figueroa M, Fregoso-Fregoso M.Bedolla-Barajas M, et al.Arch Bronconeumol. 2013 Feb;49(2):47-53. doi: 10.1016/j.arbres.2012.09.006. Epub 2012 Oct 31.Arch Bronconeumol. 2013.PMID: 23121875English, Spanish.