LEP and gastric cancer: A recent study showed that the concentration of serum leptin, which is related to the progression and angiogenesis of gastric cancer and predicts poorer prognostic outcomes (38), was significantly higher in Mongolians than in Han Chinese(3·58 ± 1·85 ng/ml and 3·02 ± 1·75 ng/ml, respectively, P = 0·049) (39).