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.
Chatham LR, Knight K, Joe GW, Simpson DD.Chatham LR, et al. Among authors: joe gw.Am J Drug Alcohol Abuse. 1995 Aug;21(3):345-61. doi: 10.3109/00952999509002702.Am J Drug Alcohol Abuse. 1995.PMID: 7484984