How Oracle's biggest-ever acquisition turned deadly

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Larry Ellison's vision for the future of medicine crystallized for him in a doctor's office.

Oracle's billionaire cofounder needed medication to help manage his cholesterol. He said his "very fancy doctor," a molecular biologist, prescribed a statin called Crestor. The choice was informed by Ellison's age, sex, ethnicity, and family history. But it was still, Ellison realized, just...