Study	Case			Control			HWE P value
Study	TT	TC	CC	TT	TC	CC	HWE P value
Zhang et al., 1997 [32]	12	18	21	45	69	36	0.3477
Frisch et al., 1999 [33]	34	45	20	46	77	49	0.1710
Tsai et al., 1999 [34]	26	44	9	36	50	10	0.2239
Bondy et al., 2000 [35]	12	49	23	27	58	40	0.4892
Arias et al., 2001 [15]	35	81	43	30	81	53	0.9222
Minov et al., 2001 [36]	31	90	51	26	56	39	0.4844
Correa et al., 2002 [37]	20	43	15	15	27	10	0.7284
Oswald et al., 2003 [38]	38	70	34	31	71	40	0.9617
Terayama et al., 2003 [23]	8	22	7	33	62	17	0.1682
Illi et al., 2009 [21]	11	41	34	45	181	169	0.7408
Kishi et al., 2009 [22]	87	154	84	220	386	196	0.3007
Yusup et al., 2013 [31]	64	113	18	19	20	11	0.2057
Guo et al., 2014 [39]	18	28	26	19	29	22	0.1552
Zhang et al., 2016 [25]	194	254	110	251	420	171	0.8456
Basu et al., 2019 [20]	31	32	17	27	41	12	0.5771