1. Department of Physical Therapy, Rehabilitation Science and Athletic Training, School of Health Professions, University of Kansas Medical Center, Kansas City, Kansas, USA.
2. Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, USA.
3. Department of Orthopedics, University of Rochester Medical Center, Rochester, New York, USA.
4. Department of Physical Therapy and Movement Science, College of Health Sciences, University of Texas at El Paso, El Paso, Texas, USA.
5. Department of Orthopedic Surgery, School of Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA.
6. Department of Neurosurgery, School of Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA.