Although the risk of clarithromycin resistance increased numerically with each prior course of clarithromycin, from 7% among clarithromycin-naïve patients to 25% among those with at least two prior courses, this did not reach statistical significance (RR = 1.5, 95% CI 0.92–2.41).
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Clinical Factors Implicated in Antibiotic Resistance in <i>Helicobacter pylori</i> Patients.
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