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. 2018 Jun 28;16(3):1859–1865. doi: 10.3892/etm.2018.6367

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Copyright: © Liu et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 1. — Flow diagram for the selection of studies included in the present systematic review and meta-analysis. Comparisons were made with patients that received allopurinol.