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(i) to compare Helicobacter pylori serology in two 70-year-old cohorts in Gothenburg, Sweden, born 21 years apart, (ii) to study H. pylori serology in a 70-year-old cohort over 20 years.

age and ageing

Helicobacter pylori serology in elderly people: a 21 -year cohort comparison in 70-year-olds and a 20-year longitudinal population study in 70-90-year-olds