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1by Wu H,Elba, Álvarez P,Ana Maria, Acevedo S,Carlos, Almarza B,Maria Isabel, Larranaga L,Carmen, Malig M,Jacqueline
Published 1992Digital revistaSCIELO -
2by Almarza B,Maria Isabel, Wu H,Elba, Vicente S,Manuela, Torres I,Graciela, Garay G,Beatriz, Alvarez P,Ana Maria
Published 1990Digital revistaSCIELO