Ierardi, Enzo, Antonio Giangaspero, Giuseppe Losurdo, Floriana Giorgio, Annacinzia Amoruso, Vincenzo De Francesco, Alfredo Di Leo, and Mariabeatrice Principi. 2014. “Quadruple Rescue Erapy Aer First and Second Line Failure for Helicobacter Pylori Treatment: Comparison Between Two Tetracycline-Based Regimens”. Journal of Gastrointestinal and Liver Diseases 23 (4), 367-70. https://doi.org/10.15403/jgld.2014.1121.234.qrth.