[Acute infections of the lower respiratory tract in children. I. etiology].
D000208:Acute Disease; D000293:Adolescent; D001424:Bacterial Infections / Q000382:microbiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011247:Pregnancy; D012141:Respiratory Tract Infections / Q000209:etiology*; D014777:Virus Diseases / Q000382:microbiology*
Infecciones agudas del tracto respiratorio inferior en niños. I. Etiologiá.