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.
Contin M, Martinelli P.Contin M, et al. Among authors: martinelli p.J Neurol. 2010 Nov;257(Suppl 2):S253-61. doi: 10.1007/s00415-010-5728-8.J Neurol. 2010.PMID: 21080186Review.