“…Meta-analysis studies are defined as a statistical tool, merging the case-control study results of different ethnic studies on the similar topic, and it has become the popular method for resolving discrepancies in genetic association studies (Lee, 2015). Many meta-analysis studies have been carried out in stroke and concluded as positive (He et al, 2017, Luo et al, 2017, Xiuju et al, 2016, Yanamala et al, 2017, Zhong et al, 2017), negative (Xia et al, 2017, Yang et al, 2017) and nominal associations (Li et al, 2017).…”