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.
Salome CM, Schoeffel RE, Woolcock AJ.Salome CM, et al.Thorax. 1981 Aug;36(8):580-4. doi: 10.1136/thx.36.8.580.Thorax. 1981.PMID: 7031973Free PMC article.
Salome CM, Marks GB, Savides P, Xuan W, Woolcock AJ.Salome CM, et al.Eur Respir J. 2000 Jul;16(1):38-43. doi: 10.1034/j.1399-3003.2000.16a07.x.Eur Respir J. 2000.PMID: 10933082Free article.Clinical Trial.