TY - JOUR AN - 37 AU - Fischbach,L. AU - Evans,E.L. TI - Meta-analysis: the effect of antibiotic resistance status on the efficacy of triple and quadruple first-line therapies for Helicobacter pylori. JO - Aliment Pharmacol Ther PY - 2007 VL - 26 SP - 343-357 M2 - 343 DO - 10.1111/j.1365-2036.2007.03386.x ER -