An issue may manifest effectiveness.Logical formLearned from3 sentences. A brief intervention may manifest effectiveness.Logical formLearned from3 sentences. Effectiveness may pertain-to a law.Logical formLearned from3 sentences. (Bicycle helmet use laws) may manifest effectiveness.Logical formLearned from3 sentences. (Safety seats) may manifest effectiveness.Logical formLearned from3 sentences. An (effectiveness estimate) can be significant.Logical formLearned from3 sentences. (Lap/shoulder belts) may manifest effectiveness.Logical formLearned from3 sentences. Some (percentage point increase) can be in effectiveness.Logical formLearned from3 sentences. Effectiveness can be used.Logical formLearned from3 sentences. Public information may manifest effectiveness.Logical formLearned from3 sentences. An experience can be in evaluating (air bag effectiveness).Logical formLearned from3 sentences. Differences can be among (effectiveness estimates).Logical formLearned from3 sentences. (Lap-shoulder belt effectiveness) may be increased to some percent.Logical formLearned from3 sentences. A (belt system) may manifest effectiveness.Logical formLearned from3 sentences. Effectiveness can be in reducing injury.Logical formLearned from3 sentences.