Environmental duodenitis and gastritis, distribution of Campylobacter piloris and relationship with intragastric pH and nitrite. Colombia Medica, [S. l.], v. 20, n. 4, p. 135–141, 1989. DOI: 10.25100/cm.v20i4.6268. Disponível em: https://colombiamedica.univalle.edu.co/index.php/comedica/article/view/6268. Acesso em: 13 mar. 2026.