title: The decreased number of new drug approvals (NDAs) has been a topic of considerable debate over the past decade. Preface.
authors: S J
authors: SJ
authors: Enna
authors: Michael
authors: M
authors: Williams
mesh_terms: D000818:Animals; D002986:Clinical Trials as Topic; D017277:Drug Approval / Q000331:legislation & jurisprudence*; D015195:Drug Design; D004345:Drug Industry / Q000191:economics / Q000639:trends*; D006801:Humans; D014481:United States; D014486:United States Food and Drug Administration