Pattra Chun-On, M.D. (IMAGE) University of Pittsburgh Caption Pattra Chun-On, M.D., Ph.D. student at the University of Pittsburgh School of Public Health Department of Environmental and Occupational Health Credit Pattra Chun-On Usage Restrictions For use only in media reports about this study 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.