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.
Lange JE, Voas RB.Lange JE, et al. Among authors: voas rb.Addiction. 2000 Apr;95(4):521-8. doi: 10.1046/j.1360-0443.2000.9545214.x.Addiction. 2000.PMID: 10829328