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Endoscopy|January 1, 1983
Endoscopic-radiological findings in metastatic obstructive jaundiceU Hoerder, N Heyder, J F RiemannFortschritte Der Medizin|February 24, 1983
[Gastrointestinal manifestation of malignant systemic diseases]J F Riemann, U Hoerder, W RödlDeutsche Medizinische Wochenschrift (1946)|February 28, 1986
[Ultrasonic endoscopy. An assessment after 3 years]N Heyder, G Lux, J F Riemann, et al.The American Journal of Gastroenterology|January 1, 1982
Splenic abscess-clinical symptoms and diagnostic possibilitiesR Freund, J Pichl, N Heyder, et al.Endoscopy|November 1, 1984
Lithotripsy in the common bile duct using ultrasound. Preliminary in vitro experimentsL Demling, H Ermert, J F Riemann, et al.Surgical Endoscopy|January 1, 1987
Endoscopic ultrasonography of tumours of the oesophagus and the stomachN HeyderFortschritte Der Medizin|October 20, 1991
[Diagnosis of gastroenterologic diseases with sonography. Part 1: Principles--ultrasound diagnosis of diffuse and local liver damage]N HeyderFortschritte Der Medizin|February 10, 1992
[Diagnosis of gastroenterologic diseases with sonography. Part 4: Interventional sonography, endoscopic sonography]N HeyderFortschritte Der Medizin|November 20, 1991
[Diagnosis of gastroenterologic diseases with sonography. Part 3: Pancreas and spleen]N HeyderFortschritte Der Medizin|November 10, 1991
[Diagnosis of gastroenterologic diseases with sonography. Part 2: Gallbladder and bile ducts]N HeyderPageof 38