illustration 1 (IMAGE) UT Southwestern Medical Center Caption Robert Haley, M.D., here reviewing brain scans of Gulf War veterans, has been studying the illness for 27 years Credit UT Southwestern Medical Center 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.