Aspirin tablets (IMAGE) Duke University Medical Center Caption Researchers at Duke Medicine have solved some of the mysteries related to the use of aspirin, and developed a blood-based test of gene activity that has been shown to accurately identify who will respond to the therapy and who is at higher risk for heart attack. Credit Duke Medicine Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.