An illustration of a kidney and samples are shown in the Investigational Pathology lab at the U.S. Food and Drug Administration (FDA) headquarters in Silver Spring, Maryland, November 5, 2009. Reuters Pictures logo Reuters Pictures 27 months ago

An illustration of a kidney and samples are shown in the Investigational Pathology lab at the U.S. Food and Drug Administration (FDA) headquarters in Silver Spring, Maryland, November 5, 2009.