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1by Trivino B,Ximena, Bedregal G,Paula, Azócar P,Marta, Valenzuela C,Patricia, González R,Carolina
Published 1997Digital revistaSCIELO -
2by Cisternas V.,Ariel, Lagos N.,Nestor, Galstuch L.,Jennifer, González R.,Carolina, García C.,Claudio, Díaz T.,Joselyn
Published 2002Digital revistaSCIELO