“…The prevalence of H. pylori in the Dutch population was determined from the results of 4 seroepidemiologic studies in healthy blood donors (n = 401 (12); n = 191 (13)), in a working population (n = 500) (14), and in 383 patients (without gastrointestinal complaints, a history of peptic ulcer disease, or the use of bismuth, H 2 -receptor antagonists, or proton pump inhibitors) visiting a geriatric outpatient department (15). (See Appendix for detailed data.)…”