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Vertex Falls on Cystic Fibrosis Drug Study

Stock quotes in this article: VRTX , DNA , GILD , NVS  

Another small study of Vertex Pharmaceuticals' (VRTX Quote) experimental cystic fibrosis drug released Monday showed that the drug, VX-770, improved lung function and was safe.

Shares of Vertex fell 3% to $24.91, however, because results from the latest VX-770 study were not entirely consistent with the previous study released last March.

Despite some questions raised about the latest VX-770 study, Vertex said Monday that it intends to work with U.S. and European regulators to design a pivotal phase III study of VX-770 to begin in 2009. ...

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