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.
Eckert DJ, Malhotra A, Lo YL, White DP, Jordan AS.Eckert DJ, et al.Chest. 2009 Apr;135(4):957-964. doi: 10.1378/chest.08-2292. Epub 2008 Dec 31.Chest. 2009.PMID: 19118266Free PMC article.
Jordan AS, White DP, Lo YL, Wellman A, Eckert DJ, Yim-Yeh S, Eikermann M, Smith SA, Stevenson KE, Malhotra A.Jordan AS, et al. Among authors: eckert dj.Sleep. 2009 Mar;32(3):361-8. doi: 10.1093/sleep/32.3.361.Sleep. 2009.PMID: 19294956Free PMC article.