. Author manuscript; available in PMC: 2014 Sep 4.
Published in final edited form as: Gastrointest Endosc. 2012 Mar 16;75(5):945–953.e2. doi: 10.1016/j.gie.2012.01.021
© 2012 American Society for Gastrointestinal Endoscopy. Published by Mosby, Inc. All rights reserved.