Fig. 2From: The impact of ginsenosides on cognitive deficits in experimental animal studies of Alzheimer’s disease: a systematic reviewThe effects of ginsenosides on (a) acquisition memory and (b) retention memory. The horizontal lines represent the mean estimated effect size and the 95 % confidence interval (CI) for each comparison. The vertical gray bars represent the 95 % CI of the pooled estimate effect sizeBack to article page