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.
Koschorreck M, Wendt-Potthoff K, Geller W.Koschorreck M, et al.Environ Sci Technol. 2003 Mar 15;37(6):1159-62. doi: 10.1021/es0259584.Environ Sci Technol. 2003.PMID: 12680669