Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF ++ Patrick J. McMahon, MD ++ Chief of Orthopedic Surgery, Veteran Affairs Healthcare System ++ Clinical Professor, University of Pittsburgh ++ Pittsburgh, Pennsylvania ++ ++ Harry B. Skinner, MD, PhD ++ Professor Emeritus of Orthopedic Surgery ++ University of California Irvine ++ Attending Physician ++ St. Jude Medical Center ++ Fullerton, California