Study Characteristics of genotypes in gastric cancer cases and controls in the analysis of Interleukin-8 -251 promoter polymorphism.

#Data of cardia type of gastric cancer were accessible;
∧Data of noncardia type of gastric cancer were accessible;
*Data of sporadic diffuse-type of gastric cancer were accessible;
¶Data of intestinal-type of gastric cancer were accessible.
+Data of the status of Helicobacter pylori of gastric cancer were accessible.
◊Here participants, though treated as Asians geographically in this study, should be better considered as separate Iranian population conducted in our subgroup analysis due to its complex ethnic components.
⊿Here participants in this study should be treated as Mexican or Hispanic population rather than Caucasian population [26], [45].
★Here control 1 in that study was selected as the control group in our meta-analysis because the gastric cancer participants were the same and control 2 was only used for further validation of the findings [20]. RFLP: Restriction fragment length polymorphisms; DHPLC: PCR-based denaturing high-performance liquid chromatography; Taqman: TaqMan polymerase chain reaction method; SSCP: Single strand conformation polymorphism; Multiplex: Multiplex polymerase chain reaction method (a variant of PCR in which two or more loci are simultaneously amplified in the same reaction); Direct: Direct sequence analysis of polymerase chain reaction; RDB: polymerase chain reaction and reverse dot blot; ASO: oligonucleotide allele specific polymerase chain reaction; MGB Eclipse: MGB Eclipse Assay polymerase chain reaction method; ARMS: Amplification refractory mutation system polymerase chain reaction; SNaPshot: the SNaPshot assay which provides detection of certain SNPs.