Prevalence of Helicobacter pylori cagA, iceA and babA2 alleles in Brazilian patients with upper gastrointestinal diseases - Gatti, Luciano Lobo; Módena, José Luiz Proença; Payão, Spencer Luiz Marques; Smith, Marília de Arruda Cardoso; Fukuhara, Yara; Modena, José Luiz Pimenta; Oliveira, Ricardo Brandt de; Brocchi, Marcelo (Acta Tropica, 2006)