Comparison of genotype distribution of MMP polymorphisms between cancer metastasis positive and negative subjects.

arepresents the number of AA+AB genotype,brepresents the number of BB+AB genotype (A represents the major allele, B represents the minor allele),cNSCLC represents non-small cell lung carcinoma,dESCC represents esophageal squamous cell carcinoma.eGCA represents gastric cardiac adenocarcinoma.