Gastric juice ascorbic acid concentrations in helicobacter pylori (+) and (-) patients - GÜLŞEN, Mustafa; YILMAZ, Kurtuluş; GÜRBÜZ, A. Kemal; BAĞCI, Sait; KÖYLÜ, Halis; UYGURER, Can; KARAEREN, Necmettin (Turkish Journal of Gastroenterology, 1995)