title: [Human immunodeficiency virus infection in children: definition and classification of the problem].
authors: M A
authors: MA
authors: Baeza-Bacab
authors: R A
authors: RA
authors: Góngora-Biachi
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000145:classification*; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant
vernacular_title: Infección por el virus de inmunodeficiencia humana en niños: definición y clasificación del problema.