[1] Emory Univ, Sch Med, Dept Med, Atlanta, GA USA
[2] Childrens Healthcare Atlanta, Aflac Canc & Blood Disorders Ctr, 2220 North Druid Hills Rd NE, Atlanta, GA 14224 USA
[3] Yale Univ, Sch Med, Dept Pediat, New Haven, CT USA
[4] Emory Univ, Sch Med, Dept Rehabil Med, Atlanta, GA USA
[5] Univ Cincinnati, Coll Med, Cincinnati Childrens Hosp Med Ctr, Cinciannati, OH USA
[6] Emory Univ, Sch Med, Dept Orthopaed, Atlanta, GA USA
[7] Emory Sports Performance & Res Ctr, Flowery Branch, CA USA