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controlled studyAn experiment or clinical trial that includes a comparison (control) group.
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controlled studyA study involving a comparison (control) group
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controlled studyAn experiment in which two groups are the same except that only one receives the drug, treatment, etc. being tested.
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controlled studyAn experiment or clinical trial that includes a comparison (control) group.
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controlled studyAn experiment or clinical trial that includes an untested comparison group, referred to as a "control group."
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controlled studyAn experiment or clinical trial that includes a comparison (control) group.
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