RT Journal Article SR Electronic T1 Diffuse multifocal lymphoma of the small intestine presenting as a duodenal ulcer JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 599 OP 602 VO 125 IS 6 A1 H. J. Freeman A1 A. A. Endelman A1 A. D. Forward A1 N. F. Quenville YR 1981 UL http://www.cmaj.ca/content/125/6/599.abstract