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.
Pérez-Lázaro A, Ascaso JF, Chapa MA, Hernández A, Catalá M, Carmena R.Pérez-Lázaro A, et al. Among authors: ascaso jf.Med Clin (Barc). 1990 May 12;94(18):693-6.Med Clin (Barc). 1990.PMID: 2388494Spanish.