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.
Stashenko EE, Ferreira MC, Sequeda LG, Martínez JR, Wong JW.Stashenko EE, et al.J Chromatogr A. 1997 Aug 29;779(1-2):360-9. doi: 10.1016/s0021-9673(97)00446-9.J Chromatogr A. 1997.PMID: 9335127
Stashenko EE, Jaramillo BE, Martínez JR.Stashenko EE, et al.J Chromatogr A. 2004 Jan 30;1025(1):93-103. doi: 10.1016/j.chroma.2003.10.058.J Chromatogr A. 2004.PMID: 14753676