Gray's basic anatomy / Richard L. Drake, PhD, FAAA, Professor Emeritus of Surgery, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio, A. Wayne Vogl, PhD, FAAA, Professor of Anatomy and Cell Biology, Department of Cellular and Physiological Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Adam W.M. Mitchell, MBBS, FRCS, FRCR, Consultant Radiologist, Director of Radiology, Fortius Clinic, London, United Kingdom ; illustrations by Richard Tibbitts and Paul Richardson ; photographs by Ansell Horn.