Greenfield's surgery scientific principles and practice / editors, Michael W. Mulholland, MD, PhD, Frederick A. Coller Distinguished Professor of Surgery, Chair. Department of Surgery, University of oMichigan, Ann Arbor, Michigan, Keith D. Lillemoe, MD, Surgeon-in-Cheif, Chief, Department of Surgery, Massachusetts General Hospital, The W. Gerald Austen Professor, Havard Medical School, Boston, Massachusetts, Gerard M. Doherty, MD, Surgeon-in-Chief, Brigham and Woman's Health Care & Dana-Farber Cancer Institute, Moseley Professor of Srgery, Harvard Medical School, Boston, Massachusetts, Gilbert R. Upchurch, Jr., MD, Chief of Vascular and Endovascular Surgery, William H. Muller, Jr. Professor rof Surgery, Professor of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, Hasan B. Alam, MD, Norman W. Thompson Professor of Surgery, Head of General Surgery, Department of Surgery, University of Michigan, Ann Arbor, Michigan, Timothy M. Pawlik, MD, MPH, PhD, Professor of Surgery and Oncology, The Urban Meyer III and Shelley Meyer Chair for Cancer Research, Chair, Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio ; illustrations by Holly R. Fischer.