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.
Copeland-Linder N, Johnson SB, Haynie DL, Chung SE, Cheng TL.Copeland-Linder N, et al. Among authors: haynie dl.J Adolesc Health. 2012 Mar;50(3):215-20. doi: 10.1016/j.jadohealth.2011.04.005. Epub 2011 Jun 12.J Adolesc Health. 2012.PMID: 22325125Free PMC article.Clinical Trial.