Table 1.

General information of the included 4 studies

First author	Publication (year)	n	Genotyping	Chemotherapy regimen	Sensitivity			Resistance
					AA	AG	GG	AA	AG	GG
Li[12]	2014	162	PCR	Doxorubicin+ methotrexate+ cisplatin	44	33	11	24	30	20
Liu[7]	2014	186	PCR	Doxorubicin+ methotrexate+ cisplatin	48	37	13	30	36	22
Teng[8]	2013	146	PCR	Adriamycin+ methotrexate+ cisplatin	35	29	13	22	28	19
Yang[13]	2012	187	PCR-RFLP	Doxorubicin+ methotrexate+ cisplatin	54	26	17	56	23	11