An (efficacy trial) can be large-scale.Logical formLearned from7 sentences. An efficacy may be shown.Logical formLearned from7 sentences. An efficacy may pertain-to a substance.Logical formLearned from7 sentences. An efficacy may pertain-to a US-president.Logical formLearned from7 sentences. An efficacy may pertain-to a surge.Logical formLearned from7 sentences. An efficacy of probiotics can be untested.Logical formLearned from7 sentences. Some approaches to a treatment of depression may retain an efficacy.Logical formLearned from7 sentences. An efficacy can be basic.Logical formLearned from7 sentences. An efficacy may pertain-to a product.Logical formLearned from7 sentences. Efficacy can be against tumors.Logical formLearned from7 sentences. An efficacy may pertain-to an (anthrax vaccine).Logical formLearned from7 sentences. Drugs can be constituted-of-or-filled-with efficacy.Logical formLearned from7 sentences. Time may show persons an efficacy.Logical formLearned from7 sentences. Studies may pertain-to an efficacy.Logical formLearned from7 sentences. An efficacy may pertain-to a concept.Logical formLearned from7 sentences.