Table 1. Half maximal inhibitory concentration (IC50) and resistance index (RI) of parental and drug-conditioned HEp-2 cells.

Cell lines	Drug	IC50	RI
parental HEp-2	cisplatin (μM)	2.11	1
	5-FU (μM)	53.92	1
	docetaxel (nM)	3.22	1
cisplatin-conditioned HEp-2	cisplatin (μM)	2.63	1.25
5-FU-conditioned HEp-2	5-FU (μM)	76.40	1.42
docetaxel-conditioned HEp-2	docetaxel (nM)	6.66	2.07
TDR HEp-2	cisplatin (μM)	3.82	1.81
	5-FU (μM)	82.55	1.53
	docetaxel (nM)	13.44	4.17