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Postoperative control for the persistence of positivity in three immunological tests used in the diagnosis of hydatidosis in children (E.L.I.S.A.-specific IgE, indirect hemagglutination and E.L.I.S.A.-total IgE).

L. LarrandMur, R. BenitoRuesca, A. SarriáChueca, 1984 .

[Physical activity and leisure time in children. I: Relation to socioeconomic status].

J. FletaZaragozano, M. BuenoSánchez, L. MurdeFrenne, 1997 .