In H. pylori- infected patients second-line treatment with sequential levofloxacin therapy was more effective than levofloxacin triple therapy but was still suboptimal
1 Gastroenterology Unit, Hospital Universitario de La Princesa, Instituto de Investigación Sanitaria Princesa (IIS-IP), Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD), Madrid, Spain.