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.
Robinson AM, Richdale AL.Robinson AM, et al. Among authors: richdale al.Child Care Health Dev. 2004 Mar;30(2):139-50. doi: 10.1111/j.1365-2214.2004.00395.x.Child Care Health Dev. 2004.PMID: 14961866
Chu J, Richdale AL.Chu J, et al. Among authors: richdale al.Res Dev Disabil. 2009 Nov-Dec;30(6):1512-22. doi: 10.1016/j.ridd.2009.07.007. Epub 2009 Aug 6.Res Dev Disabil. 2009.PMID: 19664896