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Prosecutors say the men amassed tens of millions of dollars in secret payments
New chief executive will consider pulling the plug on unprofitable agreement within months
McKinsey quietly runs an investment arm for partners but experts warn of conflicts of interest
Mike Pearson upended big pharma with Valeant and investors applauded, but critics say it risks collapse under a huge debt pile
Investment bank’s sale of shares pledged as collateral contributed to stock slide
New $173 all-cash offer trumps Dublin group’s cash-and-stock terms
Pharma group’s debt levels soar after it raises $22bn in new finance
Proposed cuts at the latest target amount to most of its budget
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