[On the utility of limiting schermographic investigations of children of school age to tuberculin-positive subjects].
D002648:Child; D006801:Humans; D007223:Infant; D012574:Schools; D014373:Tuberculin; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary
D014373:Tuberculin
TUBERCULOSIS, PULMONARY/in infancy and childhood