9Malfertheiner P, Megraud F, O'Morain C, et al;European Helicobacter pylori Study Group (EHPSG). Current concepts in the management of Helicobacter pylori infection -- the Maastricht 2-2000 Consensus Report. Aliment Pharmacol Ther, 2002, 16 (2): 167-180.
10Gomollon F, Ducons JA, Ferrero M, et al. Quadruple therapy is effective for eradicating Helicobaeter pylori after failure of triple proton-pump inhibitor-based therapy: a detailed, prospective analysis of 21 consecutive cases. Helicobacter, 1999, 4 (4): 222-225.