Dr. Arthur Westover (IMAGE) UT Southwestern Medical Center Caption Dr. Arthur Westover led a study that found elevated rates in young adults of amphetamine and cocaine usage significantly boost their risk of stroke, with amphetamine abuse associated with the greatest risk. Credit UT Southwestern Medical Center 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.