Researchers (image) UT Southwestern Medical Center Share Print E-Mail Caption Drs. Hasan Zaki (left) and SM Nashir Udden. Credit UTSW Usage Restrictions None 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.