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.
Springer AL, Gall AS, Hughes KA, Kaiser RJ, Li G, Lund KP.Springer AL, et al. Among authors: hughes ka.J Biomol Tech. 2003 Sep;14(3):183-90.J Biomol Tech. 2003.PMID: 13678148Free PMC article.