UPDATE 3-Biogen says Tecfidera sales slow, delays data readout on Alzheimer's drug

April 24, 2015 3:51 PM

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* Co delays key data readout - executives (Adds company, analyst comments on Alzheimer's drug data; Updates shares)

April 24 (Reuters) - Slowing sales of Biogen Inc's key oral multiple sclerosis (MS) drug Tecfidera and a delay in a data readout for its keenly watched Alzheimer's drug sent the company's stock down as much as 8 percent on Friday.

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