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Keeton CM, Park J, Wang GR, Hopp CM, Shoemaker NB, Gardner JF, Salyers AA.Keeton CM, et al. Among authors: gardner jf.Plasmid. 2013 Mar;69(2):172-9. doi: 10.1016/j.plasmid.2012.12.001. Epub 2012 Dec 10.Plasmid. 2013.PMID: 23237854Free PMC article.