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Schiappacasse I, Nahuelhual L, Vásquez F, Echeverría C.Schiappacasse I, et al. Among authors: echeverria c.J Environ Manage. 2012 Apr 30;97:38-45. doi: 10.1016/j.jenvman.2011.11.007. Epub 2011 Dec 28.J Environ Manage. 2012.PMID: 22325581
Birch JC, Newton AC, Aquino CA, Cantarello E, Echeverría C, Kitzberger T, Schiappacasse I, Garavito NT.Birch JC, et al. Among authors: echeverria c.Proc Natl Acad Sci U S A. 2010 Dec 14;107(50):21925-30. doi: 10.1073/pnas.1003369107. Epub 2010 Nov 24.Proc Natl Acad Sci U S A. 2010.PMID: 21106761Free PMC article.