This photo provided by Novartis shows their gene therapy medicine Zolgensma. U.S. regulators want to know why Novartis didn't disclose a problem with testing data until after they approved the Swiss drugmaker’s $2.125 million gene therapy. On Tuesday, Aug. 6, 2019, the Food and Drug Administration said the questionable data involves testing of the therapy, Zologensma, on animals, not on patients. (Novartis via AP)
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