[1] Virginia Commonwealth Univ, Dept Phys Med & Rehabil, Richmond, VA USA
[2] Oregon State Univ, Sch Psychol Sci, Corvallis, OR USA
[3] Micheli Ctr Sports Injury Prevent, Waltham, MA USA
[4] Boston Childrens Hosp, Boston, MA USA
[5] Harvard Med Sch, Dept Pediat, Boston, MA USA