Lindsay D. Nelson, Brooke E. Magnus, John K. Yue, Steve Balsis, Christopher J. Patrick, Nancy Temkin, Esther L. Yuh, Ramon Diaz-Arrastia, Ehri Ryu, Andrew I. R. Maas, David K. Menon, Lindsay Wilson, and Geoffrey T. Manley, the TRACK-TBI Investigators, on behalf of the CENTER-TBI Participants and Investigators.