We know that the low dose of aspirin is used as an anti-platelet medicine, which means it reduces the risk of clots forming in patient's blood and are being used world wide because of low cost and less side effect. But some of the people has found that this drug are not working properly and data shows that this drug is resistant to some patients. If we want to establish a diagnostic method to find out this group who are resistant to this medicine, which will be the cost effective method for that?