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Zhang HM, Bou-Assaf GM, Emmett MR, Marshall AG.Zhang HM, et al. Among authors: emmett mr.J Am Soc Mass Spectrom. 2009 Mar;20(3):520-4. doi: 10.1016/j.jasms.2008.11.010. Epub 2008 Nov 21.J Am Soc Mass Spectrom. 2009.PMID: 19095461Free PMC article.