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.
Paintsil E, Verevochkin SV, Dukhovlinova E, Niccolai L, Barbour R, White E, Toussova OV, Alexander L, Kozlov AP, Heimer R.Paintsil E, et al. Among authors: kozlov ap.Addiction. 2009 Nov;104(11):1881-90. doi: 10.1111/j.1360-0443.2009.02687.x. Epub 2009 Aug 27.Addiction. 2009.PMID: 19712125Free PMC article.
Abdala N, White E, Toussova OV, Krasnoselskikh TV, Verevochkin S, Kozlov AP, Heimer R.Abdala N, et al. Among authors: kozlov ap.BMC Public Health. 2010 Nov 5;10:676. doi: 10.1186/1471-2458-10-676.BMC Public Health. 2010.PMID: 21054855Free PMC article.