1. Heterogeneity of peptic ulcer disease;Rotter,1988
2. Acid peptic disorders;Isemberg,1992
3. Unidentified curved bacilli on gastric epithelium in active chronic gastritis;Warren;Lancet,1983
4. Helicobacter pylori infection and duodenal ulcer disease;Tytgat;Gastroenterol Clin N Am,1993
5. The role of infectious agents in peptic ulcer disease;Tytgat;Gastroenterol Int,1993