title: [Precordial leads in 200 healthy subjects in the first 20 years of life].
authors.forename: I
authors.initials: I
authors.lastname: LONGO
mesh_terms: D004562:Electrocardiography; D064368:Healthy Volunteers; D006801:Humans; D019369:Life
keywords: ELECTROCARDIOGRAPHY
vernacular_title: Contributo allo studio delle derivazioni precordiali in 200 soggetti sani nel primo ventennio di vita.