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The American Journal of Medicine|October 1, 1990
Association of Helicobacter pylori infection with dyspeptic symptoms in patients undergoing gastroduodenoscopyR M Strauss, T C Wang, P B Kelsey, et al.
Gastroenterology|October 1, 1990
Endoscopic laser lithotripsy of large bile duct stonesP B Cotton, R A Kozarek, R H Schapiro, et al.
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