Dr. John E. Pandolfino is Professor of Medicine as well as Chief of the Division of Gastroenterology and Hepatologyat Northwestern University. He received his M.D. from Loyola University Stritch School of Medicine, completed residency training in internal medicine and fellowship training in gastroenterology at Northwestern Memorial Hospital. Dr Pandolfino has recently received a Master's degree in clinical investigation from Northwestern University. He has published extensively on gastrointestinal complications in surgery, pH monitoring of esophageal acid exposure, clinical use of esophageal manometry, and therapies and management of disorders of gastrointestinal motility.