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.
López-Briz E, Ruiz-García V.López-Briz E, et al.Farm Hosp. 2005 Jul-Aug;29(4):258-64. doi: 10.1016/s1130-6343(05)73674-6.Farm Hosp. 2005.PMID: 16268742Review.Spanish.