Joseph Leung, Mr. & Mrs. C. W. Law Professor of Medicine, University of California, Davis School of Medicine, Chief of Gastroenterology, Veterans Affairs Northern California Health Care System, Sacramento, Californie, Etats-Unis. Simon K. Lo, Clinical Professor of Medicine, David Geffen School of Medicine, Director, Pancreatic and Biliary Diseases Program, Director, Gastrointestinal Endoscopy, Cedars-Sinai Medical Center, Los Angeles, Californie, Etats-Unis.