1. TG Hornby, PT, PhD, is Assistant Professor, Department of Physical Therapy, University of Illinois, Chicago, Ill; Adjunct Research Assistant Professor, Department of Physical Medicine and Rehabilitation, Northwestern University Medical School, Chicago; and Research Scientist/Physical Therapist, Sensory Motor Performance Program, Rehabilitation Institute of Chicago
2. DH Zemon, PT, is Research Physical Therapist, Sensory Motor Performance Program, Rehabilitation Institute of Chicago
3. D Campbell, PTA, is Research Physical Therapist Assistant, Sensory Motor Performance Program, Rehabilitation Institute of Chicago