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.
Zhang Y, Willis-Owen SAG, Spiegel S, Lloyd CM, Moffatt MF, Cookson WOCM.Zhang Y, et al. Among authors: moffatt mf.Am J Respir Crit Care Med. 2019 Feb 15;199(4):478-488. doi: 10.1164/rccm.201803-0438OC.Am J Respir Crit Care Med. 2019.PMID: 30339462Free PMC article.