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.
Johnson K, Derkay C.Johnson K, et al. Among authors: derkay c.Otolaryngol Clin North Am. 2009 Feb;42(1):57-70, viii. doi: 10.1016/j.otc.2008.09.007.Otolaryngol Clin North Am. 2009.PMID: 19134490Review.