No abstract available
MeSH terms
-
Campylobacter / isolation & purification
-
Campylobacter Infections / epidemiology*
-
Chronic Disease
-
Cross-Sectional Studies
-
Duodenal Ulcer / etiology
-
Gastritis / etiology
-
Hospitals, University
-
Humans
-
Pennsylvania
-
Stomach Ulcer / etiology