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.
Walker BW, Check CE, Lobring KC, Pommerening CA, Sunderlin LS.Walker BW, et al. Among authors: sunderlin ls.J Am Soc Mass Spectrom. 2002 May;13(5):469-76. doi: 10.1016/S1044-0305(02)00369-0.J Am Soc Mass Spectrom. 2002.PMID: 12019970Free article.