“…Approximately half of all casecontrol studies [26,27,29,33,38,41,45,47,49,51,53,54,57,58,60,64,67,69,71,[73][74][75][76][78][79][80]82,84,85,[89][90][91][93][94][95][96]99,100] showed an increased frequency of the ε4 allele in stroke patients, making it a highly probable risk factor for IS; in four, significant association with large-vessel IS was observed. Three groups described the 2 allele as a risk factor for IS [76,85,94].…”