“…A statistically significant finding could be noted in intestinal-type but not in sporadic diffuse-type cancer (GG-plus-GA vs. AA). As is known, cardia-type gastric cancer differs from noncardia-type gastric cancer in etiology, pathology, carcinogenesis, and/or prognosis (Heidl et al, 1993;Kim et al, 2005;Saito et al, 2006), so is intestinal-type cancer versus sporadic diffuse-type cancer. It could be said that the indiscriminate combination of cardia-type and noncardia-type cases or intestinal-type and diffuse-type cases in the majority of eligible studies may mask or at least underestimate the strength of the real associations (Xue et al, 2010Cui et al, 2011).…”