Harvey S. Levin is Professor and Director of Research in the Department of Physical Medicine and Rehabilitation at Baylor College of Medicine, Houston, Texas. He also serves as Director of the Center of Excellence for Traumatic Brain Injury (TBI) at the Michael E. De Bakey Veterans Affairs Medical Center. His research is concerned with closed head trauma in civilians and blast-related injury in veterans.David H. K. Shum is Dean of Research in the Health Group at Griffith University, Australia. Professor Shum has more than 20 years' experience studying the effects of brain injury on cognition and behavior in adults and children.Raymond C. K. Chan is Professor of Neuropsychology and Applied Cognitive Neuroscience at the Institute of Psychology of the Chinese Academy of Sciences, and Deputy Director of the Key Laboratory of Mental Health. He holds an honorary professorship at the Department of Psychiatry, University of Hong Kong.