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SILICON VALLEY — Theranos Inc. is under criminal investigation by federal prosecutors and the Securities and Exchange Commission, the company said Monday, only hours after billionaire CEO Elizabeth Holmes insisted in a television interview that the blood-testing company would survive.
Theranos was valued at about $9 billion by private investors, including Draper Fisher Jurvetson, before a series of Wall Street Journal articles in the fall raised questions about whether the company had exaggerated…