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.
Zainudin BM, Tolfree SE, Short M, Spiro SG.Zainudin BM, et al. Among authors: spiro sg.Thorax. 1988 Dec;43(12):987-91. doi: 10.1136/thx.43.12.987.Thorax. 1988.PMID: 3238642Free PMC article.
Zainudin BM, Biddiscombe M, Tolfree SE, Short M, Spiro SG.Zainudin BM, et al. Among authors: spiro sg.Thorax. 1990 Jun;45(6):469-73. doi: 10.1136/thx.45.6.469.Thorax. 1990.PMID: 2392793Free PMC article.
Mitchell DM, Solomon MA, Tolfree SE, Short M, Spiro SG.Mitchell DM, et al. Among authors: spiro sg.Thorax. 1987 Jun;42(6):457-61. doi: 10.1136/thx.42.6.457.Thorax. 1987.PMID: 3660305Free PMC article.