JAMA : the journal of the American Medical Association
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Randomized Controlled Trial Clinical Trial
Prophylactic treatment of migraine with an angiotensin II receptor blocker: a randomized controlled trial.
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Concern has been raised about possible increases in the prevalence of autism. However, few population-based studies have been conducted in the United States. ⋯ The rate of autism found in this study was higher than the rates from studies conducted in the United States during the 1980s and early 1990s, but it was consistent with those of more recent studies.