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.
Thorne C, Newell ML, Peckham CS.Thorne C, et al. Among authors: peckham cs.Child Care Health Dev. 2000 Jan;26(1):29-40. doi: 10.1046/j.1365-2214.2000.00128.x.Child Care Health Dev. 2000.PMID: 10696516
Holland FJ, Stark O, Ades AE, Peckham CS.Holland FJ, et al. Among authors: peckham cs.J Epidemiol Community Health. 1993 Dec;47(6):432-5. doi: 10.1136/jech.47.6.432.J Epidemiol Community Health. 1993.PMID: 8120494Free PMC article.