[1] Virginia Commonwealth Univ, Sch Med, Richmond, VA USA
[2] Childrens Hosp Colorado, Aurora, CO USA
[3] Univ Colorado, Sch Med, Aurora, CO USA
[4] Northeastern Univ, Boston, MA USA
[5] Univ New England, Biddeford, ME USA
[6] MassGeneral Hosp Children, Sports Concuss Program, Boston, MA USA
[7] Spaulding Rehabil Hosp, Charlestown, MA USA
[8] Spaulding Res Inst, Charlestown, MA USA
[9] Harvard Med Sch, Boston, MA USA
[10] Boston Childrens Hosp, Boston, MA USA
[11] Micheli Ctr Sports Injury Prevent, Norwood, MA USA