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. 2017 Jul 6;6(7):e005025. doi: 10.1161/JAHA.116.005025

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© 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Funnel plots for bias assessment. Each point indicates an individual study. Funnel plots did not show obvious asymmetry. lnRR indicates natural logarithm of relative risk; se of lnRR, standard error of natural logarithm of relative risk.