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.
Nicholson WL, Setlow B, Setlow P.Nicholson WL, et al.Proc Natl Acad Sci U S A. 1991 Oct 1;88(19):8288-92. doi: 10.1073/pnas.88.19.8288.Proc Natl Acad Sci U S A. 1991.PMID: 1924287Free PMC article.
Slieman TA, Nicholson WL.Slieman TA, et al. Among authors: nicholson wl.Appl Environ Microbiol. 2000 Jan;66(1):199-205. doi: 10.1128/AEM.66.1.199-205.2000.Appl Environ Microbiol. 2000.PMID: 10618224Free PMC article.