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.
Doyle LW, Faber B, Callanan C, Freezer N, Ford GW, Davis NM.Doyle LW, et al. Among authors: callanan c.Pediatrics. 2006 Jul;118(1):108-13. doi: 10.1542/peds.2005-2522.Pediatrics. 2006.PMID: 16818555
Rickards AL, Kitchen WH, Doyle LW, Ford GW, Kelly EA, Callanan C.Rickards AL, et al. Among authors: callanan c.J Dev Behav Pediatr. 1993 Dec;14(6):363-8.J Dev Behav Pediatr. 1993.PMID: 8126227