Erratum to: Clin Orthop Relat Res DOI 10.1007/s11999-013-3418-4

In the published study by Matsukura and colleagues, the scale of the Y-axis in Figure 6 is incorrect. The scale of the Y-axis should be ranging from 0 to 1200.

Fig. 6
figure 6

Colony number per synovial fluid (mL−1) was positively correlated with postinjury period (n = 22, r = 0.773, p < 0.001).

The authors apologize for this error.