title: [On the importance of systematic tuberculin investigations. (Considerations on observations carried out in 10 years in the province of Livorno)].
mesh_terms: D001699:Biometry; D006801:Humans; D055633:Immune System Phenomena; D014373:Tuberculin; D014374:Tuberculin Test / Q000706:statistics & numerical data*
chemical_list: D014373:Tuberculin
keywords: TUBERCULIN REACTION/statistics