3Bazzoli F,Zagari RM,Fossi S,et al.Efficacy and tolerability of a short term.Lowdose triple therapy for eradication of helicobactpylori(Abstract).Gastroenterology,1993,104:40.
5Ling TK,Cheng AF,Sung JJ,et al.An increase in helicobacter pylori strains resistantto metronidazole: a five-year study.Helicobatcer,1996,1:57.
6Vakil N,Hahn B,McSorley D,et al.Clarithromycin-resistant helicobacter pylori inpatient with duodenal ulcer in the United States.Am J Gastroenterol,1998,93(9): 1432.
7Graham DY,Klein PD,Opekun AR,et al.In vivo susceptibility of campylobacterpylori.Am J Gastroenterol,1989,84(3) :233.