CDDP and CPT-11
Cell line	CDDP concentration	IC50 of CPT-11 (μg/ml)	Combination index
A99	0.00	3.75	1.00
	0.50	2.59	0.83
	1.00	0.70	0.45
	2.00	0.31	0.62
	3.00	0.52	0.94
	3.74	0.00	1.00
TCC-NECT-2	0.00	1.85	1.00
	0.30	0.22	0.40
	0.60	0.07	0.60
	1.06	0.00	1.00
TYUC-1	0.00	0.20	1.00
	0.05	0.15	0.94
	0.10	0.02	0.49
	0.20	<0.01	0.77
	0.26	0.00	1.00

Abbreviations: CDDP, cisplatin; CPT-11, irinotecan.