We randomly allocated patients to esomeprazole therapy ( esomeprazole 20 mg , CAM 400 mg , amoxicillin ( AC ) 750 mg for the first 7 d , with all drugs given twice daily ) or lansoprazole therapy ( lansoprazole 30 mg , CAM 400 mg , AC 750 mg for the first 7 d , with all drugs given twice daily ) using a minimization method with age , sex , and institution as adjustment factors .