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.
Alnaes R, Torgersen S.Alnaes R, et al. Among authors: torgersen s.J Nerv Ment Dis. 1990 Nov;178(11):693-8. doi: 10.1097/00005053-199011000-00004.J Nerv Ment Dis. 1990.PMID: 2230756