Roche wins UK clearance for $4.3 billion Spark takeover as U.S. review continues

ZURICH (Reuters) - Swiss drugmaker Roche won clearance from Britain's Competition and Markets Authority for its $4.3 billion (3 billion pounds) takeover of gene therapy company Spark Therapeutics , the London Stock Exchange said on Monday, as a U.S. review continues. "The CMA found that Spark is not the only supplier developing a gene therapy treatment and that its products are not currently considered to hold any particular clinical or commercial advantages over those being developed by other..