Questionnaire approach to diagnosis in developing countries.
Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador-Bahia, Brazil.
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D002648:Child; D003906:Developing Countries; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D012552:Schistosomiasis / Q000175:diagnosis* / Q000517:prevention & control*; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*