Forest plots of correlation between eNOS gene G894T polymorphism and ischemic stroke risk in dominant (TT+GT vs. GG) model following hte exclusion of studies that deviated from Hardy-Weinberg equilibrium (HWE) in controls, a study in Africa and ‘leave-one-out’ sensitive analysis. White diamond, the pooled OR. Black squares, the OR in each study, with square sizes that are inversely proportional to the standard error of the OR. Horizontal lines represent 95% CIs. OR, odds ratio.