Pediatric rehabilitation principles and practice / editors ; Michael A. Alexander, MD, Professor, Pediatrics, Physical Medicine and Rehabilitation, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, Pennsylvania, Emeritus Medical Staff, Alfred I. duPont Hospital for Children, Wilmington, Delaware, Dennis J. Matthews, MD, Fischahs Chair, Pediatric Rehabilitation Medicine, Professor and Chair, Department of Physical Medicine and Rehabilitation, University of Colorado Denver, School of Medicine, Children's Hospital Colorado, Aurora, Colorado ; associate editor, Kevin P. Murphy, MD, Medical Director, Sanford Health Systems, Pediatric Rehabilitation, Bismark, North Dakota, Medical Director, Northern Minnesota Clinics, Gillette Children's Specialty Healthcare, Duluth, Minnesota.