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.
Jose A, King CS, Shlobin OA, Kiernan JM, Cossa NA, Brown AW, Nathan SD.Jose A, et al. Among authors: nathan sd.Chest. 2017 Nov;152(5):980-989. doi: 10.1016/j.chest.2017.05.008. Epub 2017 May 17.Chest. 2017.PMID: 28527879
Shorr AF, Davies DB, Nathan SD.Shorr AF, et al. Among authors: nathan sd.Chest. 2002 Jul;122(1):233-8. doi: 10.1378/chest.122.1.233.Chest. 2002.PMID: 12114364