. 2014 Aug 21;2(4):288–294. doi: 10.1093/gastro/gou055
© The Author(s) 2014. Published by Oxford University Press and the Digestive Science Publishing Co. Limited.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Study flow diagram.