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.
Tran Smith B, Seaton K, Andrews C, Grogan CM, Abraham A, Pollack H, Friedmann P, Humphreys K.Tran Smith B, et al. Among authors: humphreys k.Am J Drug Alcohol Abuse. 2018;44(4):426-430. doi: 10.1080/00952990.2017.1411934. Epub 2017 Dec 20.Am J Drug Alcohol Abuse. 2018.PMID: 29261341Free PMC article.
Shover CL, Davis CS, Gordon SC, Humphreys K.Shover CL, et al. Among authors: humphreys k.Proc Natl Acad Sci U S A. 2019 Jun 25;116(26):12624-12626. doi: 10.1073/pnas.1903434116. Epub 2019 Jun 10.Proc Natl Acad Sci U S A. 2019.PMID: 31182592Free PMC article.