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By: Espinosa, Mara I - Bertin, Angéline - Gómez, John - Mejía, Florencio - Guerra, Martha - Baez, Lina - Gouin, Nicolas - Patiño, EdgarType: ArticleIn: Gayana (Concepción)Volume:Series:Issue:Date: 2012-01-01Page Range:Publication Info:Subjects: