* Health and Medical News:Biogen takes aim at Alzheimer's, ALS drugs

Biogen has seen its value quadruple to more than $100 billion on the back of its successful multiple sclerosis drugs. Now it has new ambitions.



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via Health and Medical NewsHealth and Medical News Pfizer Inc has already had its takeover overtures rebuffed three times by rival AstraZeneca Plc, but investors in the U.S. drugmaker say it can tolerate a little more rejection before going hostile with the deal. AstraZeneca turned down a sweeten...

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