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Design of the previous (broken lines)10 and present (continuous line) studies. Hp, H pylori; OM10, omeprazole 10 mg once daily; OM20, omeprazole 20 mg once daily; AMO+OM, amoxicillin 1 g twice daily plus omeprazole 40 mg twice daily; OM, omeprazole 20 mg once daily. Ranitidine was given as 150 mg at bedtime.
