Successful endoscopic submucosal dissection of a flat polypoid gastric heterotopia in the rectum of a patient with ulcerative colitis  / Zsolt Dubravcsik [et al.]
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  In: Central European Journal of Gastroenterology and Hepatology. - ISSN 2415-9107. - 2015. 1. évf. 4. sz., p. 197-199. : ill.