rs189037 | AA(case/control) | AG(case/control) | GG(case/control) | P value |
 Lo YL [25] | 145/124 | 345/354 | 238/239 | 0.72 |
 Shen L [21] | 99/92 | 240/272 | 148/152 | 0.12 |
 Hsia TC [30] | 64/122 | 176/339 | 118/255 | 0.61 |
 Kim JH [24] | 105/113 | 316/306 | 190/195 | 0.71 |
 Liu J [32] | 200/154 | 435/434 | 217/264 | 0.29 |
rs664677 | TT(case/control) | TC(case/control) | CC(case/control) | P value |
 Bi N [29] | 40/42 | 120/128 | 94/88 | 0.69 |
 Lo YL [25] | 126/104 | 346/356 | 257/268 | 0.41 |
 Kim JH [24] | 82/71 | 294/303 | 233/230 | 0.06 |
 Landi S [34] | 108/85 | 134/170 | 47/54 | 0.05 |
 Yang H [33] | 445a/441a |  | 102/99 |  |
rs664143 | AA(case/control) | AG(case/control) | GG(case/control) | P value |
 Xia W [28] | 86/68 | 139/139 | 39/55 | 0.30 |
 Bi N [29] | 71/73 | 137/128 | 46/53 | 0.82 |
 Deng Q [31] | 102/86 | 164/158 | 49/69 | 0.82 |
 Kim JH [24] | 180/185 | 356/312 | 87/119 | 0.54 |
 Yang H [33] | 104/95 | 433b/441b |  |  |
rs609429 | CC(case/control) | CG(case/control) | GG(case/control) | P value |
 Lo YL [25] | 142/125 | 349/369 | 232/234 | 0.32 |
 Landi S [34] | 35/52 | 101/113 | 92/70 | 0.62 |
 Yang H [33] | 103/100 | 436c/438c |  |  |
rs189037(RP) | AA(case/control) | AG(case/control) | GG(case/control) | P value |
 Zhang L [22] | 8/38 | 26/89 | 10/82 | 0.12 |
 Xiong H [26] | 24/74 | 22/149 | 10/82 | 0.70 |
 Xiao Y [27] | 11/13 | 22/22 | 15/14 | 0.48 |
 Yang M [35] | 34d/127d |  | 10/82 |  |