Stroke Trial Hospitals (image) University of Michigan Health System Caption These 24 community hospitals across the lower peninsula of Michigan participated in the INSTINCT stroke trial. The 12 shown as gray dots were randomly assigned to receive education and 24/7 phone support from University of Michigan stroke experts; the 12 in white were not. Use of tPA clotbuster rose more at the 12 intervention hospitals. Credit University of Michigan Health System Usage Restrictions None 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.