The prevalance of Helicobacter pylori in upper gastrointestinal disease - OĞUZ, Dilek; ESKİOĞLU, Erdal and KÖSEOĞLU, Tankut and ÜNER, Enver and TERZİOĞLU, Serdar and KULAÇOĞLU, Sezer (Turkish Journal of Gastroenterology, 1995)