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. Author manuscript; available in PMC: 2016 Oct 27.
Published in final edited form as: J Thorac Cardiovasc Surg. 2014 Aug 14;148(6):3084–3089. doi: 10.1016/j.jtcvs.2014.07.106

Figure 1. Observed delivery of transfusion of 1 or 2 units of RBCs across regions.

Figure 1

Boxes represent the interquartile range within each center, whereas the “whiskers” represent the minimum and maximum center-level transfusion rate within each region.