[1] Boston Univ, Sch Med, Alzheimers Dis & CTE Ctr, Boston, MA 02118 USA
[2] Boston Univ, Sch Med, Dept Neurol, 72 E Concord St,Suite B7800, Boston, MA 02118 USA
[3] Boston Univ, Sch Med, Dept Neurosurg, 72 E Concord St,Suite B7800, Boston, MA 02118 USA
[4] Boston Univ, Sch Med, Dept Anat & Neurobiol, 72 E Concord St,Suite B7800, Boston, MA 02118 USA
[5] Boston Univ, Alzheimers Dis & CTE Ctr, Boston, MA USA
[6] Boston Univ, Sch Med, Dept Neurol, Alzheimers Dis & CTE Ctr, Boston, MA 02118 USA
[7] Boston Univ, Sch Med, Dept Med, Boston, MA 02118 USA
[8] Boston Univ, Sch Med, Boston Med Ctr, Dept Surg,Div Gen Surg,Sect Acute Care & Trauma S, Boston, MA 02118 USA
[9] Boston Univ, Sch Med, Boston Med Ctr, Injury Prevent Ctr, Boston, MA 02118 USA
[10] Boston Univ, Sch Med, Dept Emergency Med, Boston, MA 02118 USA
[11] Boston Med Ctr, Dept Emergency Med, Boston, MA USA
[12] Harvard Univ, Interfac Initiat Hlth Policy, Cambridge, MA 02138 USA