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Life table analysis of patients without sufficient symptoms to require specific active management after successful treatment in the four treatment groups (placebo, ranitidine, omeprazole 10 mg (OM10), or omeprazole 20 mg (OM20)). At time 0 the proportion of patients with successful two week treatment is given; these patients entered follow up. The number of patients per group is given in the text. Hp, Helicobacter pylori.
