Bravo LE, Realpe JL, Portilla H, Parra AE, Valenzuela N. Environmental duodenitis and gastritis, distribution of Campylobacter piloris and relationship with intragastric pH and nitrite. Colomb Med [Internet]. 1989 Dec. 31 [cited 2025 Dec. 7];20(4):135-41. Available from: http://colombiamedica.univalle.edu.co/index.php/comedica/article/view/6268