Douglas Wallace, (IMAGE) Children's Hospital of Philadelphia Caption Dr. Douglas Wallace is director of the Center for Mitochondrial and Epigenomic Medicine at The Children's Hospital of Philadelphia. Credit The Children's Hospital of Philadelphia 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.