1. Faul, M., Xu, L., Wald, M. M. & Coronado, V. G. Traumatic brain injury in the United States: emergency department visits, hospitalizations, and deaths, 2002–2006. Centers for Disease Control and Prevention [online], http://www.cdc.gov/traumaticbraininjury/tbi_ed.html (2010).
2. Langlois, J. A., Rutland-Brown, W. & Wald, M. M. The epidemiology and impact of traumatic brain injury: a brief overview. J. Head. Trauma. Rehabil. 21, 375–378 (2006).
3. Center for Disease Control. Nonfatal traumatic brain injuries from sports and recreation activities --- United States, 2001--2005. MMWR 56, 733–737 (2007).
4. Weinberger, S. Bombs’ hidden impact: the brain war. Nature 477, 390–393 (2011).
5. Miller, G. The invisible wounds of war. Healing the brain, healing the mind. Science 333, 514–517 (2011).