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.
Singer HS, Reiss AL, Brown JE, Aylward EH, Shih B, Chee E, Harris EL, Reader MJ, Chase GA, Bryan RN, et al.Singer HS, et al. Among authors: reiss al.Neurology. 1993 May;43(5):950-6. doi: 10.1212/wnl.43.5.950.Neurology. 1993.PMID: 8492951