Table 1. The statistics of different PPI resources.

Network	#genes	#interactions	#cancer genes
Lit-BM	5,545	11,045	131
PrePPI	4,989	25,403	95
HI-II-14	4,303	13,944	45
Co-Frac	2,898	13,571	35
AP-MS	7,668	23,744	102