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.
Paz-Bailey G, Koumans EH, Sternberg M, Pierce A, Papp J, Unger ER, Sawyer M, Black CM, Markowitz LE.Paz-Bailey G, et al.Arch Pediatr Adolesc Med. 2005 Jun;159(6):536-42. doi: 10.1001/archpedi.159.6.536.Arch Pediatr Adolesc Med. 2005.PMID: 15939852
Samoff E, Koumans EH, Markowitz LE, Sternberg M, Sawyer MK, Swan D, Papp JR, Black CM, Unger ER.Samoff E, et al.Am J Epidemiol. 2005 Oct 1;162(7):668-75. doi: 10.1093/aje/kwi262. Epub 2005 Aug 24.Am J Epidemiol. 2005.PMID: 16120706