[1] Walter Reed Natl Mil Med Ctr, Traumat Brain Injury Ctr Excellence, Dept Res, Bethesda, MD USA
[2] Walter Reed Natl Mil Med Ctr, Natl Intrepid Ctr Excellence, Dept Res, Bethesda, MD USA
[3] Uniformed Serv Univ Hlth Sci, F Edward Hebert Sch Med, Bethesda, MD USA
[4] Gen Dynam Informat Technol, Dept Res, Silver Spring, MD USA
[5] Univ British Columbia, Fac Med, Vancouver, BC, Canada
[6] Walter Reed Natl Mil Med Ctr, Traumat Brain Injury Ctr Excellence, Gen Dynam Informat Technol, Bldg 51,Room 1502B,4954 N Palmer Rd, Bethesda, MD 20889 USA