DeLisa's physical medicine & rehabilitation principles and practice / editor-in-chief, Walter R. Frontera, MD, PhD, MA (Hon.), FRCP (Lond.), Professor Department of Physical Medicine, Rehabilitation, and Sports Medicine, Department of Physiology and Bioshysics University of Puerto Rico School of Medicine, San Juan, Puerto Rico ; editor emeritus, Joel A. DeLisa, MD, MS, Emeritus Professor Department of Physical Medicine & Rehabilitation Rutgers New Jersey Medical School, Newark, New Jersey, Clinical Professor Department of Neurosurgery ad Physical Medicine Albuquerque, New Mexico Clinical Professor Department of Medical Education 7 Clinical Sciences, Elson S. College of Medicine Washington State University, Spokane, Washington ; editors, Jeffrey Basford, MD, PhD, Professor Department of Physical Medicine and Rehabilitation Mayo Clinic, Rochester, Minnesota, William Bockenek, MD, Professor Department of Physical Medicine and Rehabilitation, Carolinas Medical Center/Atrium Health, Chair of PMR, Chief Medical Officer Carolinas Rehabilitation, Charlotte, North Carolina, John Chae, MD, Professor and Chair Physical Medicine & Rehabilitation Case Western Reserve University Vice President, Research and Sponsored Programs MetroHealth Research Institute MetroHealth System, Cleveland, Ohio, Lawrence R. Robinson, MD, Professor and Chief, PM&R Department of Medicine University of Toronto Chief, Rehabilitation St. John's Rehab Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada ; associate editors, Michael Boninger, MD, Joanne Borg-Stein, MD, Gregory T. Carter, MD, MS, Leighton Chan, MD, MPH, Gerard Francisco, MD, Helen Hoenig, MD, MPH, Alan Jette, PhD,PT, Heidi Prather, DO.