Efficacy of two different dosage regimens of omeprazole, amoxycillin and metronidazole for the cure of Helicobacter pylori infection. - Bayerdörffer E; Lonovics J; Dité P; Díete U; Domján L; Kisfalvi I; Mégraud F; Pap A; Sipponen P; Burman CF; Zeijlon L (Alimentary pharmacology & therapeutics, 1999)