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Important health problem
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Recognisable latent or early symptomatic stage
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The natural history is understood
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Accepted treatment
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Suitable test or examination that has a high level of accuracy
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Test should be acceptable to the population
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Agreed policy on whom to treat as patients
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Facilities for diagnosis and treatment should be available
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Cost of screening should be economically balanced in relation to possible expenditure on medical care as a whole
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Screening should be a continuing process