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Researchers Find Big Batch of Breast Cancer Genes  
5/29/2007 12:08:56 AM

WASHINGTON (Reuters) - A genetic mutation that raises the risk of breast cancer is found in up to 60 percent of U.S. women, making it the first truly common breast cancer susceptibility gene, researchers reported on Sunday. Reports from several teams around the world identified changes in four other genes that raise the risk of breast cancer significantly. Several are found in many men and women.
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