Dr. Joshua Denson (IMAGE) Tulane University Caption Lead study author Dr. Joshua Denson, assistant professor of medicine and pulmonary and critical care medicine physician at Tulane University School of Medicine. Credit Paula Burch-Celentano, Tulane University Usage Restrictions None 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.