Division of Digestive and Liver Diseases, Columbia University, New York, New York
David A. Katzka
Correspondence: Address correspondence to: David A. Katzka, MD, Division of Digestive and Liver Diseases, Columbia University Medical Center, Presbyterian Hospital, 622 West 168th Street, New York, New York 10031.; Division of Digestive and Liver Diseases, Columbia University, New York, New York
