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1by Castro B,Abdón, Castro S,José I, Yong P,Bernal, Mas R,Carlos, Gutiérrez,Rafael, Faerron A,Jorge
Published 2006Digital revistaSCIELO -
2by Gutiérrez A,Rafael, Faerron A,Jorge, Arguello C,Leslie, Obando V,Aiza, Vargas S,Mauricio, Suárez Z,Adrián
Published 2005Digital revistaSCIELO