The National Institutes of Health says carbidopa delays the changes in levodopa until it reaches the brain.

VOA: special.2009.04.07

While the health care bill has cleared Congress, the Senate must still sign-off on a series of changes approved by the House.

VOA: standard.2010.03.22

Several Democrats have said their town hall meetings were not as raucous, and they insist reform supporters remain adamant that Congress should approve changes to the U.S.health care system.

VOA: standard.2009.09.04