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. 2015 Mar 19;19(1):92. doi: 10.1186/s13054-015-0833-9

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© He et al.; licensee BioMed Central. 2015

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 use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Forest plots of pooled estimates for bleeding volume and red blood cell transfusion. (A) Bleeding volume after surgery. (B) Red blood cell transfusion (unit). HES, hydroxethyl starch. IV, Inverse Variance.