| a population based study of helicobacter pylori infection in a european country: the san marino study. relations with gastrointestinal diseases. | helicobacter pylori is present worldwide but few large population studies exist on the epidemiology of the infection. a random cross sectional study was performed of h pylori infection in the adult population of san marino, a european country with high gastric cancer rate, to assess its prevalence and to evaluate its relations with gastrointestinal disease. in 2237 subjects (77% of the initial sample) h pylori igg antibodies were detected with enzyme linked immunosorbent assay (elisa) and immuno ... | 1995 | 7615270 |