[The decline of tuberculous infection in schoolchildren of Barcelona].
de March Ayuela
P
P
D001500:BCG Vaccine / Q000008:administration & dosage; D002648:Child; D006801:Humans; D013030:Spain; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology* / Q000517:prevention & control
D001500:BCG Vaccine
El declive de la infección tuberculosa en los escolares de Barcelona.