Wa Xian, University of Houston (IMAGE) University of Houston Caption Wa Xian, research associate professor at the Stem Cell Center at University of Houston, is cloning stem cells to take aim at pediatric Crohn's disease. Credit University of Houston 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.