Frequency of Helicobacter Pylori in Perforated Peptic Ulcer and Associated Risk Factors. Medical Forum Monthly, [S. l.], v. 35, n. 12, 2024. DOI: 10.60110/medforum.351247. Disponível em: https://medicalforummonthly.com/index.php/mfm/article/view/5172.. Acesso em: 31 may. 2026.