Table 1.

Combination indexes (CI) for ZSTK474 and Imatinib.

Cell line	Drug	IC50 (μM)	r	CI
				ED50	ED75	ED90
K562	ZSTK474	4.69	0.969
	Imatinib	0.20	0.998	0.37	0.39	0.54
	ZSTK474+Imatinib	0.78	0.971
K562/A02	ZSTK474	7.57	0.981
	Imatinib	2.87	0.969	0.08	0.16	0.39
	ZSTK474+Imatinib	0.24	0.962