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Beard DA, Pettersen KH, Carlson BE, Omholt SW, Bugenhagen SM.Beard DA, et al.F1000Res. 2013 Oct 8;2:208. doi: 10.12688/f1000research.2-208.v2. eCollection 2013.F1000Res. 2013.PMID: 24555102Free PMC article.