Renzhi Han, PhD (IMAGE) Indiana University School of Medicine Caption Renzhi Han, PhD, is the senior author of the study and a professor of pediatrics at the IU School of Medicine. Credit Indiana University School of Medicine Usage Restrictions Courtesy Indiana University School of Medicine License Original 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.