Dewan, R Diagnosis of Helicobacter pylori infection in primary and tertiary care centers. [electronic resource] - Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology Aug 2000 - S11-4; discussion S15 p. digital Publication Type: Journal Article ISSN: 0254-8860 Subjects--Topical Terms: Breath TestsHelicobacter Infections--diagnosisHelicobacter pyloriHumansSensitivity and SpecificityUrease