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.
Hagen E, Sømhovd M, Hesse M, Arnevik EA, Erga AH.Hagen E, et al. Among authors: erga ah.J Subst Abuse Treat. 2019 Feb;97:21-27. doi: 10.1016/j.jsat.2018.11.010. Epub 2018 Nov 22.J Subst Abuse Treat. 2019.PMID: 30577896Free article.