HAIDER, Iqbal; HUSSAIN, Dildar; MUHAMMMAD, Ali. SPECTRUM OF HELICOBACTER PYLORI IN HUNDRED PATIENTS PRESENTING WITH PERFORATED DUODENAL ULCER. Journal of Postgraduate Medical Institute, [S. l.], v. 25, n. 4, 2011. Disponível em: https://www.jpmi.org.pk/index.php/jpmi/article/view/1144. Acesso em: 14 sep. 2025.