1. WT Cade, PT, PhD, is Postdoctoral Fellow, Division of Endocrinology, Metabolism and Lipid Research, Department of Internal Medicine, Washington University School of Medicine, 660 S Euclid Ave, St Louis, MO 63110 (USA). He was a doctoral student in the Department of Physical Therapy and Graduate School, University of Maryland School of Medicine, Baltimore, Md, at the time this article was written
2. L Peralta, MD, is Associate Professor of Pediatrics and Chief, Division of Adolescent and Young Adult Medicine, and Director, Adolescent HIV Program, Department of Pediatrics, University of Maryland School of Medicine
3. RE Keyser, PhD, is Assistant Professor, Department of Physical Therapy, University of Maryland School of Medicine