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Ex-Regulator Said to Testify GlaxoSmithKline Withheld Study

A former U.S. Food and Drug Administration official said GlaxoSmithKline Plc withheld from regulators a study showing its Avandia diabetes drug may cause heart attacks, according to two people familiar with her deposition in a lawsuit against the drugmaker.

Dr. Rosemary Johann-Liang, a former manager in the FDA’s drug-safety unit, told lawyers suing Glaxo that the 2001 study found Avandia posed a greater heart-attack risk than rival medicines, the people said. Glaxo also didn’t turn over an e-mail from researchers who concluded Avandia “strengthens the signals” of heart ailments, she testified in a pre-trial deposition last month, according to the people.