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.
Vilar-Compte D, Sánchez-Mejorada G, Mohar A, Sandoval S, Gordillo P, de la Rosa M, Lozano A, Volkow P.Vilar-Compte D, et al.Rev Invest Clin. 1996 Jul-Aug;48(4):253-60.Rev Invest Clin. 1996.PMID: 8966388Spanish.