| Statement 9. After failure of standard triple therapy, a bismuths quadruple therapy (PPI, bismuth, tetracycline, and metronidazole) for 14 days is recommended as a second-line therapy. |
| Grade of recommendation: strong |
| Level of evidence: high |
| Experts’ opinions: completely agree (90.0%), mostly agree (6.7%), partially agree (3.3%), mostly disagree (0%), completely disagree (0%), not sure (0%) |
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