Stefano Guerra, MD, PhD, MPH (IMAGE) University of Arizona Health Sciences Caption Stefano Guerra, MD, PhD, MPH, is director of population sciences at the University of Arizona Health Sciences Asthma and Airway Disease Research Center and the Henry E. Dahlberg Chair in Asthma Research at the UArizona College of Medicine – Tucson. Credit University of Arizona Health Sciences 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.