| abo blood group, secretor status and detection of helicobacter pylori among patients with gastric or duodenal ulcers. | patients (454) referred for gastroscopy to the general hospital of athens were examined to determine (1) if non-secretors were over-represented among patients with ulcers and (2) if there was an association with abo blood group or secretor status and carriage of helicobacter pylori. compared with the local population, among patients with either gastric ulcer (51) or duodenal ulcer (96) there was a significant increase in the proportion of those who were blood group o (p less than 0.025); however ... | 1991 | 2019293 |