Screening Trials
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Screening trials test new ways for detecting diseases or health conditions. More precisely, a screening trial is designed to assess or test the efficacy of devices, techniques, procedures, or tests to detect the presence of disease or condition (or risk factors for a disease or condition), usually before there are any symptoms.

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NIH Clinical Research Trials and You: Glossary of Common Terms
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NIH Clinical Research Trials and You The Basics: What are the types of clinical trials?

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