controlled clinical trial


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(kun-TROLED KLIH-nih-kul TRY-ul)

A clinical study that compares people getting treatment (treatment group) to people who do not receive this treatment (control group). The patients in the control group get no treatment at all (just a dummy pill, called a placebo), or a different treatment than the one being tested.

Read more about clinical trials.

Rollin_betty_tcm8-329628

Audio contributed by: Betty Rollin

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