Defense Centers of Excellence for Psychological Health and Traumatic Brain Injury (DCoE) co-sponsored a psychological health and traumatic brain injury (TBI) workshop in March 2009 to develop common data elements for psychological health and TBI research. Nearly 50 organizations participated in the workshop, which was also cosponsored by the National Institute of Neurological Disorders and Stroke, Department of Veterans Affairs (VA) and National Institute on Disability and Rehabilitation Research.