A controlled study of the efficacy of lansoprazole in combination with two differents dual antibiotic associations during Helicobacter pylori (H pylori) gastric infection in children: N. Kalach1, PH. Benhamou1, J. Raymond2, M. Bergeret2, P. Barbet3, F. Briet4, B. Flourié4, L. Senouci1, D. Gendrel1, C. Dupont1. 1Dept. of Pediatric Gastroenterology, 2Dept. of bacteriology, 3Dept. of Pathology, Hôpital Saint Vincent de Paul, 4INSERM U 290, Hôpital Saint-Lazare, Paris, France