1. Military Traumatic Brain Injury Initiative, Uniformed Services University, Bethesda, Maryland, USA;
2. Department of Neurosurgery, Walter Reed National Military Medical Center, Bethesda, Maryland, USA;
3. John A. Feagin Sports Medicine Fellowship, Keller Army Community Hospital, United States Military Academy, West Point, New York, USA;
4. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland, USA;
5. F. Edward Herbert School of Medicine, Uniformed Services University, Bethesda, Maryland, USA;
6. Department of Physical Medicine and Rehabilitation, Uniformed Services University, Bethesda, Maryland, USA