KnowraPlacebo-controlled trialLinked fromLinked fromThe 15 pages that link to Placebo-controlled trial, each with the reason it gives.All 15Broader topic 2Related 10Narrower topic 1Compared with 2PlaceboBroader topic: This design tests whether an intervention produces benefits beyond those seen with placebo.Control groupBroader topic: This specific design uses a placebo as the control condition.