Table 2. Main characteristics of studies under the conditions of all subjects with exposure to pesticides included in the meta-analysis.

Study	Year	Country	Sample size(case/control)	GSTM1				GSTT1
				Case		Control		Case		Control
				Present	Null	Present	Null	Present	Null	Present	Null
Karami	2008	Central and Eastern European	36/23	19	17	6	17	28	8	15	8
Buzio	2003	Italy	26/30	15	11	11	19	20	6	24	6
Brüning	1997	German	45/48	27	18	17	31	42	3	37	11