Dellon Evan S, Shaheen Nicholas J
Center for Esophageal Diseases and Swallowing and Center for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Gastroenterology. 2010 Jul;139(1):7-13.e3. doi: 10.1053/j.gastro.2010.05.016. Epub 2010 May 20.