Fig. 2From: Comparison of platelet reactivity between prasugrel and ticagrelor in patients with acute coronary syndrome: a meta-analysisQuality assessment of the included studies. a Risk (%) of bias among the included studies. Green represents low risk of bias; yellow, unclear risk of bias; and red, high risk of bias. b Risk of bias items among the 10 included studies. +,?, and − indicate low, unclear, and high risk of bias, respectivelyBack to article page