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.
Zlotnik VA, Kacimov A, Al-Maktoumi A.Zlotnik VA, et al.Ground Water. 2017 Nov;55(6):797-810. doi: 10.1111/gwat.12530. Epub 2017 May 2.Ground Water. 2017.PMID: 28464226