Table 1.

The characteristics of included studies

Publication Year	Author	Ethnicity	Case/Control	VV	LV	LL	V	L
2000	Gardemann et al.	Germany	1170/1330	335/380	563/630	272/320	1233/1390	1107/1270
2001	Sasaoka et al.	Japanese	136/235	29/70	72/120	35/45	130/260	142/210
2003	Song et al.	Chinese	156/75	40/10	82/37	34/28	162/57	150/93
2004	Listì et al.	Italian	96/118	19/31	38/49	39/38	76/111	116/125
2004	Wei et al.	Chinese	144/150	54/29	63/86	27/35	171/144	117/156
2005	Fang et al.	Indian	137/110	32/47	83/52	22/11	147/127	146/74
2006	Pan et al.	Chinese	90/115	36/27	34/57	20/31	106/111	74/119
2007	Chang et al.	Chinese	600/725	223/396	252/147	125/182	698/939	502/511
2007	Xu et al.	Chinese	72/80	29/18	27/40	16/22	85/76	59/84
2008	Kang et al.	Chinese	95/89	25/26	54/50	16/13	104/102	86/76
2008	Wei et al.	Chinese	265/280	83/58	136/158	46/64	302/274	228/286
2009	Listì et al.	Italian	431/119	121/21	208/63	102/35	450/105	412/133
2009	Reschner et al.	Slovenia	142/310	35/91	67/166	40/53	137/348	147/272
2010	Huang et al.	Chinese	62/88	19/13	32/47	11/28	70/73	54/103
2010	Shalia et al.	India	100/116	21/26	44/63	35/27	86/115	114/113