Combination vaccines: issues in evaluation of effectiveness and safety.
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Epidemiology Department, Merck Research Laboratories, Blue Bell, PA, USA.
D017277:Drug Approval; D015340:Epidemiologic Research Design; D006801:Humans; D012449:Safety; D014481:United States; D014486:United States Food and Drug Administration; D017778:Vaccines, Combined
D017778:Vaccines, Combined