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Nature 445, 354-355 (25 January 2007) | doi:10.1038/445354a; Published online 24 January 2007

Crunch time for multiple-gene tests

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Sophisticated new genetic tests face an uncertain future — unless they can win clear-cut approval from regulators, insurers and, most importantly, doctors. Virginia Gewin reports.

For many of the women who will learn this year that they have early-stage breast cancer, chemotherapy won't do any good. And a sophisticated genetic test is already available that might help to predict who they are.