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.
Sandberg-Wollheim M, Axéll T, Hansen BU, Henricsson V, Ingesson E, Jacobsson L, Larsson A, Lieberkind K, Manthorpe R.Sandberg-Wollheim M, et al.Neurology. 1992 Apr;42(4):845-7. doi: 10.1212/wnl.42.4.845.Neurology. 1992.PMID: 1565240