Prevelance of Helicobacter pylori in dyspeptic patients - GÜLŞEN, Mustafa; BAĞCI, Sait; UYGURER, Can; KARAEREN, Necmettin; ÇETİN, Celalettin; KARAOVA, Savaş; KARALAR, Mehmet; SOYSAL, Sadi; DAĞALP, Kemal; ALPER, Ahmet (Turkish Journal of Gastroenterology, 1997)