1. Pseudoachalasia Caused by Retroperitoneal B-Cell Lymphoma
Alec J. Moorman, Brant K. Oelschlager, Stephen J. Rulyak 
Clinical Gastroenterology and Hepatology 
Volume 6, Issue 6, Pages A32-A32.e2 (June 2008)
DOI: /j.cgh
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