Full text: Available Index: LILACS (Americas) Main subject: Unified Health System / Health Systems / Health Status Indicators / Medical Assistance Type of study: Etiology study / Risk factors Language: Portuguese Journal: Estud. av Journal subject: Science / Social Sciences / Public Health Year: 2003 Type: Article Affiliation country: Brazil Institution/Affiliation country: Faculdade de Medicina de Ribeirão Preto/BR