6Hines JR,Geurkink RE,Gordon RT.Postbulbar peptic ulceration of the duodenum[J].Surg Gynecol Obstet,1976,142(1):13-15.
7Graham DY,Hepps KS,Ramirez FC,et al.Treatment of helicobacter pylori reduces the rate of rebleeding in peptic ulcer disease[J].Scand J Gastroenterol,1993,28(11):939-942.