| Geoffrey Paul Kohn Laparoscopic robot-assisted completion cholecystectomy: a report of three casesGeoffrey P Kohn Department of Surgery, University of North Carolina at Chapel Hill, NC 27599 7081, USA Int J Med Robot 5:406-9. 2009 Recent trends in bariatric surgery case volume in the United StatesGeoffrey P Kohn Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 7081, USA Surgery 146:375-80. 2009 National trends in esophageal surgery--are outcomes as good as we believe?Geoffrey Paul Kohn Department of Surgery, University of North Carolina, Chapel Hill, NC 27599 7081, USA J Gastrointest Surg 13:1900-10; discussion 1910-2. 2009
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