Timothy Hand, Ph.D. (IMAGE) University of Pittsburgh Caption Timothy Hand, Ph.D., associate professor of pediatrics and immunology at Pitt’s School of Medicine and UPMC Children’s Hospital of Pittsburgh Credit University of Pittsburgh Usage Restrictions For use with embargoed 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.