Billionaire investor William Ackman, right, whose hedge fund holds a large stake in Valeant and controls two seats on its board of directors, with Valeant's outgoing CEO, J. Michael Pearson, from left and former chief financial officer Howard Schiller testifies on Capitol Hill in Washington, Wednesday, April 27, 2016, before a Senate Special Committee on Aging hearing on drastic price hikes by Valeant and a handful of other drugmakers that have stoked outrage from patients, physicians and politicians nationwide. (AP Photo/Manuel Balce Ceneta)

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