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Bowen BP, Northen TR.Bowen BP, et al. Among authors: northen tr.J Am Soc Mass Spectrom. 2010 Sep;21(9):1471-6. doi: 10.1016/j.jasms.2010.04.003. Epub 2010 Apr 12.J Am Soc Mass Spectrom. 2010.PMID: 20452782Free article.Review.