Textbook of the cervical spine / Francis H. Shen, MD, Warren G. Stamp Endowed Professor, Division Head, Spine Division, Director, Spine Fellowship, Co-Director, Spine Center, Department of Orthopaedic Surgery, University of Virginia Health Science Center, Charlottesville, Virginia, Dino Samartzis, DSc, Warden, Hornell Hall, Assistant Professor, Director of Clinical Spine Research, Department of Orthopaedics and Traumatology, Deputy Director, Laboratory and Clinical Research Institute for Pain, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong, Kong, Richard G. Fessler, MD, PhD, Professor, Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois.