Prevalence of Helicobacter pylori infection in peptic ulcer perforations. Swiss Medical Weekly, [S. l.], v. 131, n. 0708, p. 99–103, 2001. DOI: 10.4414/smw.2001.06118. Disponível em: https://smw.ch/index.php/smw/article/view/29. Acesso em: 15 oct. 2025.