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.
Feinberg ME, Ridenour TA, Greenberg MT.Feinberg ME, et al. Among authors: greenberg mt.J Prim Prev. 2008 Mar;29(2):145-65. doi: 10.1007/s10935-008-0130-3. Epub 2008 Mar 26.J Prim Prev. 2008.PMID: 18365313