Shaun Grannis, Regenstrief Institute (image) Indiana University Caption Shaun Grannis, M.D., M.S. is a Regenstrief Institute investigator and an associate professor of family medicine at Indiana University School of Medicine. Credit Regenstrief Institute Usage Restrictions Photo credit to Regenstrief Institute 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.