Photo credit: Jacqueline Littée, RN. All rights reserved.
Last Revised: December 7, 2011
Author: Healthwise Staff
Medical Review: Adam Husney, MD - Family Medicine & Arvydas D. Vanagunas, MD - Gastroenterology
To learn more visit Healthwise.org
© 1995-2013 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.