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15. [Guidelines for the interpretation of double-contrast colonic radiography: diagnosis of polyps]. Weissman A, Clot M, Grellet J. Gastroenterol Clin Biol; 1977 Mar 14; 1(3):281-96. PubMed ID: 892307 [No Abstract] [Full Text] [Related]
16. [Mucosal relief patterns in the colon (author's transl)]. Persigehl M, Cen M, Hetfeld A, Frik W. Rofo; 1981 Oct 14; 135(4):453-60. PubMed ID: 6212364 [Abstract] [Full Text] [Related]