Accuracy of 13C-urea breath test in clinical use for diagnosis of Helicobacter pylori infection - Riepl, R L; Folwaczny, C; Otto1, B; Klauser1, A; Blendinger, C; Wiebecke, B; König, A; Lehnert, P; Heldwein, W (Zeitschrift für Gastroenterologie, 2000)