James Carollo1, Sayan De, Venu Akuthota. 1. From the Center for Gait and Movement Analysis (CGMA), Children's Hospital Colorado, Physical Medicine & Rehabilitation and Orthopaedics, University of Colorado School of Medicine, Aurora, Colorado (JC); Orthopaedic Surgery, University of Colorado School of Medicine, Aurora, Colorado (SD); and Department of Physical Medicine and Rehabilitation, University of Colorado School of Medicine, Aurora, Colorado (VA).