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Babcock RC, Shears NT, Alcala AC, Barrett NS, Edgar GJ, Lafferty KD, McClanahan TR, Russ GR.Babcock RC, et al. Among authors: alcala ac.Proc Natl Acad Sci U S A. 2010 Oct 26;107(43):18256-61. doi: 10.1073/pnas.0908012107. Epub 2010 Feb 22.Proc Natl Acad Sci U S A. 2010.PMID: 20176941Free PMC article.