Justin Schaal, PhD (IMAGE) Keck School of Medicine of USC Caption Justin Schaal, PhD, assistant professor of research pathology at the Keck School of Medicine of USC Credit USC photo/ Ricardo Carrasco III Usage Restrictions none 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.