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Schoepfer, A; Jost, C; Oehen, HP; Bruendler, R (2006). Colonoscopy in Crohn's disease: subserosal bowel perforation presenting as a combination of gas in the portal vein, the mesentery fat and the retroperitoneum. Gastrointestinal endoscopy, 64(5), pp. 818-9. New York, N.Y.: Elsevier
