C. Munro Cullum, Ph.D. (IMAGE) UT Southwestern Medical Center Caption C. Munro Cullum, Ph.D. Credit UT Southwestern Medical Center of Dallas, TX Usage Restrictions UT Southwestern Medical Center of Dallas, TX 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.