EA Crowell Jr Professor & Chair of Surgery Ronald J. Weigel, MD, PhD, MBA Gastrointestinal, Minimally invasive and Bariatric Surgery Faculty Peter N. Nau, MD, MS, FACS Jessica K. Smith, MD, MPH, FACS, FASMBS Ryan K. Lehmann, DO, FACS, FASMBS ‹ Our People up Past Fellows › Printer-friendly version