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.
Ashley DL, Smith MM, Silva LK, Yoo YM, De Jesús VR, Blount BC.Ashley DL, et al. Among authors: blount bc.Environ Sci Technol. 2020 Jan 21;54(2):1066-1074. doi: 10.1021/acs.est.9b05745. Epub 2020 Jan 6.Environ Sci Technol. 2020.PMID: 31865698