David C. Whitcomb, MD, PhD 
University of Pittsburgh and University of Pittsburgh Medical Center, Division of Gastroenterology, Hepatology, and Nutrition, PUH, Mezzanine 2, C Wing, 200 Lothrop Street, Pitsburgh, PA 15213, USA
Adam Slivka, MD, PhD 
Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh Medical Center, Presbyterian University Hospital, 200 Lothrop Street, M Level, C Wing, Pittsburgh, PA 15213, USA
Kenneth K. Lee, MD 
Division of Gastroenterology and Hepatology, University of Pittsburgh Medical Center, 200 Lothrop Street, Pittsburgh, PA 15213, USA