1. R. Xia, MS, PhD, Department of Physical Therapy, University of Saint Mary, 4100 S 4th St, Leavenworth, KS 66048 (USA).
2. J.R. Stone, MD, PhD, Center for Health Policy and Ethics, School of Medicine, Creighton University, Omaha, Nebraska.
3. J.E. Hoffman, PT, DPT, CCS, Department of Physical Therapy, Creighton University.
4. S.G. Klappa, PT, PhD, Department of Physical Therapy, University of Saint Mary, and Department of Physical Therapy, Davenport University, Grand Rapids, Michigan.