Table 1. Combination Indices of in vitro cytotoxicity assays.

VCR [ng/mL]	DEX [nM]	ASP [U/mL]	Combination Index Values
			CEM	COG-LL-317	COG-LL-319	RS4-11
0.5	50	1	0.15	0.10	0.10	0.04
1.25	125	2.5	0.33	0.11	0.11	0.09
2.5	250	5	0.61	0.15	0.15	0.16
5	500	10	1.04	0.21	0.21	0.10

VCR, vincristine; DEX, dexamethasone; ASP, l-asparaginase.