Results from meta-analysis of IL-18 gene promoter haplotypes.

GC: Gynecological cancer; NC: Nasopharyngeal carcinoma; GUC: Genitourinary system cancer; GIC: Gastrointestinal cancer; BC: Breast cancer; N: number of studies included; OR: odds ratio; Ph: p value for heterogeneity; *OR with statistical significance; astudies with more than 500 participants; bstudies with less than 500 participants;