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Quebec regulator says claims against Valeant worrying; shares extend fall

By Euan Rocha TORONTO (Reuters) – The securities regulator in Quebec, where Valeant Pharmaceuticals International is headquartered, said on Thursday that recent allegations against the drugmaker are “worrying,” even as Valeant shares slid further amid growing investor concern about the company’s prospects. On Wednesday, Citron Research, an influential short-selling firm, accused Valeant in a report of using specialty pharmacies to inflate its revenue. The claims sent Valeant shares into a