Beth Hoffman, Ph.D., M.P.H. (IMAGE) University of Pittsburgh Caption Beth Hoffman, Ph.D., M.P.H. Credit University of Pittsburgh Usage Restrictions Only to be used in relation to this release 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.