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Editorial

Nature Biotechnology 25, 363 (1 April 2007) | doi:10.1038/nbt0407-363

Sacrificing the cash cow

Amgen must be longing for the days when the only worry for its EPO products, Epogen and Aranesp, was how to sell more drug to more patients. But now it looks as if it is going to fall foul of a familiar pharmaceutical malaise—overextension of its franchise.