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.
Bernabé E, Villanueva KM, Flores-Mir C.Bernabé E, et al.Angle Orthod. 2004 Dec;74(6):765-8. doi: 10.1043/0003-3219(2004)074<0765:TWRICA>2.0.CO;2.Angle Orthod. 2004.PMID: 15673138Free article.