[Respiratory infection. Study of 133 families].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006306:Health Surveys; D006801:Humans; D007223:Infant; D008297:Male; D008800:Mexico; D008875:Middle Aged; D012141:Respiratory Tract Infections / Q000453:epidemiology*
Infección respiratoria. Estudio de 133 familias.