title: Studies on the prevalence of renal disease and hypertension in relation to schistosomiasis: I Some aspects of epidemiological methods in the rural illiterate setting.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004522:Educational Status; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology*; D007674:Kidney Diseases / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009549:Nigeria; D012423:Rural Health; D012552:Schistosomiasis / Q000453:epidemiology*