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Halligan BD, Slyper RY, Twigger SN, Hicks W, Olivier M, Greene AS.Halligan BD, et al. Among authors: greene as.J Am Soc Mass Spectrom. 2005 Mar;16(3):302-6. doi: 10.1016/j.jasms.2004.11.014. Epub 2005 Jan 13.J Am Soc Mass Spectrom. 2005.PMID: 15734322Free PMC article.