Document Classification

Section Type: METHODS

Text: Patients were randomly assigned to one of four omeprazole-amoxicillin treatment groups, with each treatment administered for 2 weeks : O2A2 group (33 patients) -- omeprazole 20 mg twice/day plus amoxicillin 500 mg 4 times/day ; O2A1 group (32 patients) -- omeprazole 20 mg twice/day plus amoxicillin 250 mg 4 times/day ; O1A2 group (32 patients) -- omeprazole 20 mg once/day plus amoxicillin 500 mg 4 times/day ; and O1A1 group (31 patients) -- omeprazole 20 mg once/day plus amoxicillin 250 mg 4 times/day.