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.
Silva-Beltrán NP, Ruiz-Cruz S, Chaidez C, Ornelas-Paz Jde J, López-Mata MA, Márquez-Ríos E, Estrada MI.Silva-Beltrán NP, et al.Int J Environ Health Res. 2015;25(3):299-311. doi: 10.1080/09603123.2014.938030. Epub 2014 Jul 25.Int J Environ Health Res. 2015.PMID: 25059828