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Title
Letter: bismuth, levofloxacin, amoxicillin, PPI quadruple therapy is not an effective first or second-line regimen in the presence of levofloxacin resistance - authors' reply.
A response from the authors of the article "Helicobacter pylori second-line rescue therapy with levofloxacin- and bismut-containing quadruple therapy after failure of standard triple or non-bismuth quadruple treatments" that was published in the 2015 issue is presented.