A (square design) can be randomized.Logical formLearned from2 sentences. A single-blind study can be randomized.Logical formLearned from2 sentences. A randomized trial may enroll some patients.Logical formLearned from2 sentences. Randomized clinical trials may find that something-is-the-case.Logical formLearned from2 sentences. A natural experiment can be randomized.Logical formLearned from2 sentences. A (pilot comparison study) can be randomized.Logical formLearned from2 sentences. (Breast cancer) can be a randomized trial of an (exercise program).Logical formLearned from2 sentences. A randomized trial may test a hypothesis.Logical formLearned from2 sentences. A scheduler can be randomized.Logical formLearned from2 sentences. Randomized controlled trials may compare a policy of doses of surfactant to a policy of doses of surfactant.Logical formLearned from2 sentences. A randomized trial can be to date.Logical formLearned from2 sentences. A randomized trial may assess an effect of supplementation.Logical formLearned from2 sentences. Some randomized trials may be included in a review.Logical formLearned from2 sentences. A randomized controlled trial can be necessary.Logical formLearned from2 sentences. Some randomized controlled trials may be included for analysis.Logical formLearned from2 sentences.