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Harper CC, Miller ZM, Williams ER.Harper CC, et al. Among authors: williams er.Anal Chem. 2023 Nov 14;95(45):16659-16667. doi: 10.1021/acs.analchem.3c03160. Epub 2023 Nov 2.Anal Chem. 2023.PMID: 37917546
Leib RD, Flick TG, Williams ER.Leib RD, et al. Among authors: williams er.Anal Chem. 2009 May 15;81(10):3965-72. doi: 10.1021/ac900294r.Anal Chem. 2009.PMID: 19354265Free PMC article.
Flick TG, Leib RD, Williams ER.Flick TG, et al. Among authors: williams er.Anal Chem. 2009 Oct 15;81(20):8434-40. doi: 10.1021/ac901405w.Anal Chem. 2009.PMID: 19754104Free PMC article.