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Development of dyspepsia (A) and musculoskeletal pain (B) during the study, as assessed by the patients on a 100 mm visual analogue scale. OAC-P, amoxicillin+omeprazole+clarithromycin, followed by placebo; OAC-O, amoxicillin+omeprazole+clarithromycin, followed by omeprazole; O-O, omeprazole followed by omeprazole; P-P, placebo followed by placebo.
