Inclusion and exclusion criteria
Eligible studies were included in this meta-analysis according to the following criteria: (1) case-control studies, (2) ConsideringGAS5 polymorphisms in cancer risk, and (3) Available genotype distribution frequencies. Exclusion criteria were (1) non-human studies; (2) Duplicate or overlapping studies (in this case, the study with a larger sample size was included); (3) Not relevant to cancer or polymorphism.