Today, U.S. Senator Herb Kohl, Chairman of the Special Committee on Aging, wrote Dr. Margaret Hamburg, Commissioner of the Food and Drug Administration (FDA) commending her Agency's recent decision to require medical device manufacturers to conduct post-market surveillance for high-risk, metal-on-metal hip implants. In his letter to Hamburg, Kohl suggests that more surveillance of high-risk devices is still necessary, particularly for devices that were approved through the FDA's fast-track review process... 
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