Mégraud, F [Diagnosis of Helicobacter pylori infection is still a timely issue]. [electronic resource] - Gastroenterologie clinique et biologique Apr 1998 - 405-6 p. digital Publication Type: Editorial; Comment ISSN: 0399-8320 Subjects--Topical Terms: Breath TestsHelicobacter Infections--complicationsHelicobacter pyloriHumansPeptic Ulcer--etiology