Comparison of ranitidine bismuth citrate, tetracycline and metronidazole with ranitidine bismuth citrate and azithromycin for the eradication of Helicobacter pylori in patients resistant to PPI based triple therapy - ALTINTAŞ, Engin; ULU, Oğuz; SEZGİN, Orhan and AYDIN, Özlem and ÇAMDEVİREN, Handan (Turkish Journal of Gastroenterology, 2004)