1. Department of Orthopaedic Surgery, Division of Physical Medicine and Rehabilitation, Washington University in St Louis School of Medicine, St Louis, MO, USA (ALC, DMH); Brown School Evaluation Center, Brown School at Washington University in St Louis, St Louis, MO, USA (EMS, NLD, MWR); Kirksville College of Osteopathic Medicine, A. T. Still University, Kirksville, MO, USA (EMS); Department of Physical Medicine and Rehabilitation, Weill Cornell Medical College, New York, NY, USA (HP)