Index: LILACS (Americas) Main subject: Public Health / Health Status Indicators / Morbidity / Mortality / Ecosystem / Health Resources Type of study: Etiology study / Prognostic study / Risk factors Limits: Adolescent / Adult / Child / Female / Humans / Male Country/Region as subject: South America / Venezuela Language: Spanish Journal: Gac. méd. Caracas Journal subject: Medicine Year: 1996 Type: Article