. Author manuscript; available in PMC: 2014 Jul 1.
Published in final edited form as: Gastroenterology. 2013 May 14;145(1):10.1053/j.gastro.2013.05.008. doi: 10.1053/j.gastro.2013.05.008
© 2013 The American Gastroenterological Association.
Published by Elsevier Inc. All rights reserved.