Hydatid disease. 1988-1990.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D004443:Echinococcosis / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D007223:Infant; D008875:Middle Aged; D013030:Spain / Q000453:epidemiology