Figure 3
![Figure 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2407-14-92/MediaObjects/12885_2013_Article_4315_Fig3_HTML.jpg)
Hypoxia, IFP, and cell density data for A-07 and R-18 melanoma xenografts showing that high HF Pim and high IFP were associated with high cell density. HFPim for A-07 tumors with low and high cell densities (cell densities below and above the median value of 1.8 × 105 cells/mm3) (A), HFPim for R-18 tumors with low and high cell densities (cell densities below and above the median value of 4.2 × 105 cells/mm3) (B), IFP for A-07 tumors with low and high cell densities (C), and IFP for R-18 tumors with low and high cell densities (D). Columns and bars represent mean values and standard errors (n = 7 for A-07 and n = 6 for R-18).