Greg Arling, Ph.D., Regenstrief Institute (IMAGE) Indiana University Caption Regenstrief Institute investigator Greg Arling, Ph.D., is also an Indiana University Center for Aging Research scientist. Credit Regenstrief Institute Usage Restrictions Photo credit to Regensntrief Institute 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.