Conflict-of-interest rules restricting scientists with financial ties to drug and device- makers from advising U.S. regulators may loosen next year, said Food and Drug Administration Commissioner Margaret Hamburg. A 2008 policy limiting researchers who were paid by manufacturers from serving on advisory panels may be curtailing feedback the FDA receives, Hamburg told the advocacy group Public Citizen in Washington today. Changes may come through a renewal of the law letting the agency receive fees from companies such as Pfizer Inc. (PFE) for product reviews.