1. SK Carter, PT, PhD, OCS, is Assistant Professor, Department of Physical Therapy, College of Health Science and Human Service, University of Toledo–Health Science Campus, Mail Stop 1027, 3000 Arlington Ave, Toledo, OH 43614-2598 (USA)
2. JA Rizzo, MD, is Professor, Department of Preventive Medicine and Economics, and Director, Center for Health Services and Outcomes Research, Stony Brook State University of New York, Stony Brook, NY