Randomized controlled trials may pertain-to drugs.Logical formLearned from1 sentences. Evidence can be from some randomized controlled trials of drugs.Logical formLearned from1 sentences. Some randomized trials can be constituted-of-or-filled-with (prostate cancer screening).Logical formLearned from1 sentences. Results of some randomized trials of (prostate cancer screening) may be published.Logical formLearned from1 sentences. Research may use randomized controlled trials.Logical formLearned from1 sentences. A randomized trial may pertain-to an echinacea.Logical formLearned from1 sentences. Randomized controlled trials may support a conclusion.Logical formLearned from1 sentences. (Placebo trials) can be randomized.Logical formLearned from1 sentences. Vitamins may lend themselves to randomized controlled trials.Logical formLearned from1 sentences. A randomized controlled trial may have power.Logical formLearned from1 sentences. An autograft can be in a randomized trial.Logical formLearned from1 sentences. Randomized trials can be an undertaking.Logical formLearned from1 sentences. A preference can be for randomized trials.Logical formLearned from1 sentences. Randomized trials can be over methods.Logical formLearned from1 sentences. An (identification system) can be randomized.Logical formLearned from1 sentences.