Cervical spine deformity surgery / Christopher P. Ames, MD, Professor Clinical Neurological Surgery and Orthopaedic Surgery University of California, San Franciso Director of Spinal Deformity Surgery UCSF Medical Center San Francisco, California, USA, K. Daniel Riew, MD, Professor of Orthopedic Surgery, Columbia University Chief, Cervical Spine Surgery & Co-Director, Spine Division Co-Director, Columbia University Spine Fellowship Department of Orthopedic Surgery Columbia Univsersity/New York Presbyterian Hospital New York, New York, USA, Justin S. Smith, MD, PhD, Harrison Distingushed Professor Chief of Spine Division Department of Neurosurgery University of Virginia Charlottesvill, Virginia, USA, Kuniyoshi Abumi, MD, Director Sapporo Orthopaedic Hospital-Centre for Spinal Disorders Professor Emeritus Hokkaido University Sapporo, Japan.