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.
Duke NN, Scal PB.Duke NN, et al. Among authors: scal pb.Matern Child Health J. 2011 Jan;15(1):98-105. doi: 10.1007/s10995-009-0547-1.Matern Child Health J. 2011.PMID: 20012347
Blewett LA, Johnson PJ, Lee B, Scal PB.Blewett LA, et al. Among authors: scal pb.J Gen Intern Med. 2008 Sep;23(9):1354-60. doi: 10.1007/s11606-008-0659-0. Epub 2008 May 28.J Gen Intern Med. 2008.PMID: 18506542Free PMC article.