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.
Karch DL, Dahlberg LL, Patel N, Davis TW, Logan JE, Hill HA, Ortega L; Centers for Disease Control and Prevention (CDC).Karch DL, et al.MMWR Surveill Summ. 2009 Mar 20;58(1):1-44.MMWR Surveill Summ. 2009.PMID: 19305379Free article.
Karch DL, Lubell KM, Friday J, Patel N, Williams DD; Centers for Disease Control and Prevention (CDC).Karch DL, et al.MMWR Surveill Summ. 2008 Apr 11;57(3):1-45.MMWR Surveill Summ. 2008.PMID: 18401333Free article.
Logan J, Hall J, Karch D.Logan J, et al.Arch Gen Psychiatry. 2011 Sep;68(9):935-41. doi: 10.1001/archgenpsychiatry.2011.85.Arch Gen Psychiatry. 2011.PMID: 21893660