Reduction in Graph Size. A zoomed view of Figure 6, showing the effectiveness of each preprocessing method at reducing graph size. ES preprocessing results in the smallest reduced graph, often leaving only a small fraction of the vertices left by other methods.
Eblen et al. BMC Bioinformatics 2012 13(Suppl 10):S5 doi:10.1186/1471-2105-13-S10-S5