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Scandinavian Journal of Gastroenterology|January 1, 1975
Endoscopic papillotomy. Experimental studies and initial clinical experienceH Koch, M Classen, O Schaffner, et al.Gut|March 1, 1970
Portal hypertension caused by partial nodular transformation of the liverM Classen, K Elster, H J Pesch, et al.MMW, Munchener Medizinische Wochenschrift|February 4, 1977
[Diagnostic methods in the bulbus duodeni. Agreement and disagreement between endoscopic, roentgenological and histological examinations (author's transl)]G A Dette, P Frühmorgen, M Classen, et al.MMW, Munchener Medizinische Wochenschrift|February 4, 1977
[Diagnostic Methods in the Bulbus Duodeni. Agreement and Disagreement between Endoscopic, Roentgenological and Histological Examination (author's transl)]G A Dette, P Fühmorgen, M Classen, et al.Langenbecks Archiv Fur Chirurgie|November 1, 1977
[Role of endoscopy in diagnosis and therapy (author's transl)]L DemlingPageof 43