[1] Univ N Carolina, Dept Exercise & Sport Sci, Sports Med Res Lab, Chapel Hill, NC 27599 USA
[2] Calif State Univ Penn, California, PA USA
[3] Emerson Hosp, Neurosurg Serv, Concord, MA USA
[4] Brigham & Womens Hosp, Neurol Sports Injury Ctr, Boston, MA 02115 USA
[5] Univ Georgia, Athens, GA 30602 USA
[6] Univ Colorado, Sch Med, Dept Neurosurg, Denver, CO USA
[7] Waukesha Mem Hosp, Program Neurosci, Neuropsychol Serv, Waukesha, WI USA
[8] Princeton Univ, Princeton, NJ 08544 USA
[9] Arizona Sch Hlth Sci, Dept Sport Hlth Care, Mesa, AZ USA