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. 2013 Aug 20;8(8):e72245. doi: 10.1371/journal.pone.0072245

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© 2013 Chen et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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This forest plot is created by the software of RevMan 5.1.0. Test of heterogeneity (I² = 0%) indicates the absence of substantial heterogeneity. The bottom of diamond indicates the pooled response rate (RR0.95, P = 0.28).