. 2013 Mar 12;1(1):42–50. doi: 10.1093/gastro/got003
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This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
PRISMA flow chart showing trial selection methodology.