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Serial eradication rates of the Helicobacter pylori infection during 3 periods of time. The eradication rates in the OAMB group during each period were all superior to those in the OAC group, especially during 2010-2012 (p=0.01). OAC: omeprazole, amoxicillin, clarithromycin, OAMB: omeprazole, amoxicillin, metronidazole, bismuth salts.
