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Acta Gastroenterologica Latinoamericana|January 1, 1987
[Fecal alpha 1-antitrypsin clearance in protein-losing enteropathies in pediatrics]L A Heffes Nahmod, N Litwin, E GuastavinoActa Gastroenterologica Latinoamericana|January 1, 1986
[Determination of amylase creatinine clearance in children and adolescents]L A Heffes Nahmod, N Litwin, E Guastavino, et al.Acta Gastroenterologica Latinoamericana|January 1, 1980
[Prolonged diarrhea in infancy: effect of deconjugated bile acids and cholestyramine action]L A Heffes, N H Litwin, R Licastro, et al.Arquivos De Gastroenterologia|January 1, 1984
[Fibrocystic disease of the pancreas: a presentation feature. Anatomopathological report]L A Heffes Nahmod, J Ortiz, J L Cervetto, et al.Pageof 1