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-Orive J, Ibarra Ponce de León JC.Pérez-Orive J, et al.Salud Publica Mex. 2019 Jul-Ago;61(4):545-548. doi: 10.21149/10431. Epub 2019 Jun 5.Salud Publica Mex. 2019.PMID: 31314215Spanish.