Document Classification

Section Type: METHODS

Text: Healthy subjects who were H. pylori-positive by rapid serological test and 13C-urea breath test were randomly assigned to (i) omeprazole (O) 20 mg b. d. + amoxycillin (A) 1 g t. d. s. for 14 days (OA) ; (ii) A 1 g b. d. + clarithromycin (C) 500 mg b. d. for 7 days (AC) ; (iii) C 250 mg b. d. + metronidazole (M) 500 mg b. d. for 7 days (CM) ; (iv) O 20 mg b. d. + C 250 mg b. d. + M 500 mg b. d. for 7 days (MOC) ; or (v) O 20 mg b. d. + C 500 mg b. d. + A 1 g b. d. for 7 days (OAC).