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.
Lazarchik DA, Frazier KB.Lazarchik DA, et al. Among authors: frazier kb.Gen Dent. 2009 Mar-Apr;57(2):151-6; quiz 157-8.Gen Dent. 2009.PMID: 19552365Review.