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Deutsche Medizinische Wochenschrift (1946)|September 23, 1983
[Endoscopic-sonographic diagnosis of the stomach wall]W D Strohm, M Classen
Scandinavian Journal of Gastroenterology. Supplement|January 1, 1986
Benign lesions of the upper GI tract by means of endoscopic ultrasonographyW D Strohm, M Classen
Endoscopy|March 1, 1992
Optical resolution and color performance of electronic endoscopesH K Seidlitz, M Classen
Zeitschrift Fur Gastroenterologie|October 20, 2015
[Evaluation of endoscopic live case demonstrations--the patient's and participant's perspective]U G Pfeifer, H Neuhaus
Endoscopy|September 1, 1980
Experiences with the long standing nasobiliary tube in biliary diseasesD Wurbs, J Phillip, M Classen
Endoscopy|September 1, 1981
A new method for the endoscopic determination of gastrointestinal ulcer areaH Dancygier, D Wurbs, M Classen
Medizinische Klinik (Munich, Germany : 1983)|October 15, 1994
[Substitution of factor XIII concentrate in treatment refractory ulcerative colitis. A prospective pilot study]R Lorenz, P Born, M Classen
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