Dr. Katherine High, Children's Hospital of Philadelphia (image) Children's Hospital of Philadelphia Share Print E-Mail Caption Dr. Katherine High delivered the 2013 E. Donnall Thomas Lecture to the American Society of Hematology. Credit American Society of Hematology Usage Restrictions Please credit the American Society of Hematology when using this photo. Share Print E-Mail 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.