Some controlled clinical trials may examine an efficacy of vouchers.Logical formLearned from2 sentences. Clinical trials may assess an efficacy of incentives.Logical formLearned from2 sentences. A (trial information) can be about efficacy.Logical formLearned from2 sentences. Research can be into an efficacy of treating individuals.Logical formLearned from2 sentences. Studies may evaluate an efficacy of drug.Logical formLearned from2 sentences. Findings may show an efficacy of medications.Logical formLearned from2 sentences. An (efficacy trial) can be successful.Logical formLearned from2 sentences. Researcher may report an (efficacy trial).Logical formLearned from2 sentences. Treatments may establish efficacy.Logical formLearned from2 sentences. Compounds may show efficacy.Logical formLearned from2 sentences. Evidence can be for an efficacy of interventions.Logical formLearned from2 sentences. Research can be on an efficacy of prevention.Logical formLearned from2 sentences. An interim analysis may specify an (efficacy outcome) of interest.Logical formLearned from2 sentences. An interim analysis can be constituted-of-or-filled-with (efficacy data).Logical formLearned from2 sentences. (Study efficacy data) may undergo a monitoring.Logical formLearned from2 sentences.