Correction

In the legend to Fig. 9, the bar for B was given as 320 μm. The correct measurement is 125 μm. The correct figure legend appears below:

Figure 9. Effect of blocking VEGF activity on recruitment of TRAP⁺ cells into developing metatarsals. (A) Dark field photographs of sections of E17 wild-type (+/+) and MMP-9 null (MMP-9^−/−) metatarsals hybridized with a ³⁵S-labeled VEGF antisense probe. (B) Adjacent sections of metatarsals cultured for 3 d in control IgG or mFlt-IgG stained with hematoxylin and eosin (upper panels) or for TRAP activity (lower panels). Bars, (A) 200 μm; (B) 125 μm.