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.
Kinder BW, Collard HR, Koth L, Daikh DI, Wolters PJ, Elicker B, Jones KD, King TE Jr.Kinder BW, et al. Among authors: collard hr.Am J Respir Crit Care Med. 2007 Oct 1;176(7):691-7. doi: 10.1164/rccm.200702-220OC. Epub 2007 Jun 7.Am J Respir Crit Care Med. 2007.PMID: 17556720Free PMC article.
Kim EJ, Collard HR, King TE Jr.Kim EJ, et al. Among authors: collard hr.Chest. 2009 Nov;136(5):1397-1405. doi: 10.1378/chest.09-0444.Chest. 2009.PMID: 19892679Free PMC article.Review.