Dr. Winston Liaw (IMAGE) University of Houston Caption Dr. Winston Liaw, principal investigator and chair of the Department of Health Systems and Population Health Sciences at the Tilman J. Fertitta Family College of Medicine. Credit University of Houston Usage Restrictions N/A 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.