Table 1. Main data of studies included in the meta-analysis.

First author, year	Genotype distribution cases/control
	GG	GA	AA	G	A
Wang,2005	0.60/0.77	0.36/0.16	0.04/0.07	0.78/0.85	0.22/0.15
Wu,2007	0.80/0.86	0.18/0.13	0.02/0.02	0.89/0.92	0.11/0.08
Yang,2005	0.66/0.76	0.34/0.21	0.00/0.03	0.83/0.86	0.17/0.14
Li,2004	0.86/0.88	0.13/0.11	0.01/0.01	0.93/0.94	0.07/0.06
Yucesoy,2001	0.42/0.49	0.56/0.49	0.02/0.03	0.70/0.73	0.30/0.27
Wang,2005	0.87/0.96	0.13/0.04	0.00/0.00	0.94/0.98	0.06/0.02
Wang,2012	0.62/0.76	0.340.22	0.04/0.01	0.79/0.88	0.21/0.13
Isa,2012	0.42/0.49	0.47/0.44	0.11/0.07	0.66/0.71	0.340.29
Corbett,2002	0.60/0.61	0.34/0.30	0.06/0.09	0.77/0.76	0.23/0.24