Essentials of physical medicine and rehabilitation musculoskeletal disorders, pain, and rehabilitation / [edited by] Walter R. Frontera, MD, PhD, Professor and Chair (inaugural), Department of Physical Medicine and Rehabilitation, Vanderbilt University School of Medicine, Medical Director of Rehabilitation Services, Vanderbilt University Medical Center, Nashville, Tennessee, Adjunct Professor, Department of Physiology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico ; Julie K. Silver, MD, Associate Professor, Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts ; Thomas D. Rizzo, Jr., MD, Consultant, Department of Physical Medicine and Rehabilitation, Mayo Clinic, Jacksonville, Florida, Assistant Professor, Physical Medicine and Rehabilitation, Mayo Clinic College of Medicine, Rochester, Minnesota.