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.
Lacassin F, Leport C.Lacassin F, et al. Among authors: leport c.Rev Med Interne. 1993;14(9):871-6. doi: 10.1016/s0248-8663(05)81147-6.Rev Med Interne. 1993.PMID: 8191107Review.French.