[1] Childrens Hosp Philadelphia, Div Emergency Med, Colket Translat Res Bldg,3501 Civ Ctr Blvd, Philadelphia, PA 19104 USA
[2] Childrens Hosp Philadelphia, Ctr Injury Res & Prevent, Philadelphia, PA 19104 USA
[3] Childrens Hosp Philadelphia, Sports Med & Performance Ctr, Philadelphia, PA 19104 USA
[4] Univ Penn, Perelman Sch Med, Clin Pediat, Philadelphia, PA 19104 USA
[5] Univ Penn, Perelman Sch Med, Pediat, Philadelphia, PA 19104 USA
[6] Brown Univ, Dept Emergency Med, Alpert Med Sch, Providence, RI 02912 USA
[7] Brown Univ, Dept Pediat, Alpert Med Sch, Providence, RI 02912 USA
[8] Hasbro Childrens Hosp, Providence, RI USA